internal/pkg/common/omci_cc.go

/*
 * Copyright 2020-2024 Open Networking Foundation (ONF) and the ONF Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Package common provides global definitions
package common

import (
	"container/list"
	"context"
	"encoding/binary"
	"encoding/hex"
	"fmt"
	"strconv"
	"strings"
	"sync"
	"time" //by now for testing

	"github.com/google/gopacket"
	// TODO!!! Some references could be resolved auto, but some need specific context ....

	"github.com/opencord/omci-lib-go/v2"
	me "github.com/opencord/omci-lib-go/v2/generated"
	oframe "github.com/opencord/omci-lib-go/v2/meframe"

	vgrpc "github.com/opencord/voltha-lib-go/v7/pkg/grpc"

	"github.com/opencord/voltha-lib-go/v7/pkg/log"
	"github.com/opencord/voltha-protos/v5/go/common"
	"github.com/opencord/voltha-protos/v5/go/extension"
	ia "github.com/opencord/voltha-protos/v5/go/inter_adapter"
)

// ### OMCI related definitions - retrieved from Python adapter code/trace ####

const maxGemPayloadSize = uint16(2048)
const connectivityModeValue = uint8(5)

//const defaultTPID = uint16(0x8100)
//const broadComDefaultVID = uint16(4091)

// UnusedTcontAllocID - TODO: add comment
const UnusedTcontAllocID = uint16(0xFFFF) //common unused AllocId for G.984 and G.987 systems

const cOmciDeviceIdentifierPos = 3
const cOmciBaseMessageTrailerLen = 40

// tOmciReceiveError - enum type for detected problems/errors in the received OMCI message (format)
type tOmciReceiveError uint8

const (
	// cOmciMessageReceiveNoError - default start state
	cOmciMessageReceiveNoError tOmciReceiveError = iota
	// Error indication wrong trailer length within the message
	cOmciMessageReceiveErrorTrailerLen
	// Error indication missing trailer within the message
	cOmciMessageReceiveErrorMissTrailer
)

// CDefaultRetries - TODO: add comment
const CDefaultRetries = 2

// ### OMCI related definitions - end

// CallbackPairEntry to be used for OMCI send/receive correlation
type CallbackPairEntry struct {
	CbRespChannel chan Message
	CbFunction    func(context.Context, *omci.OMCI, *gopacket.Packet, chan Message) error
	FramePrint    bool //true for printing
}

// CallbackPair to be used for ReceiveCallback init
type CallbackPair struct {
	CbEntry CallbackPairEntry
	CbKey   uint16
}

// OmciTransferStructure - TODO: add comment
type OmciTransferStructure struct {
	chSuccess      chan bool
	OnuSwWindow    *ia.OmciMessages
	cbPair         CallbackPair
	txFrame        []byte
	timeout        int
	retries        int
	highPrio       bool
	withFramePrint bool
}

type txRxCounters struct {
	txArFrames   uint32
	txNoArFrames uint32
	rxAkFrames   uint32
	rxNoAkFrames uint32
}

// OmciCC structure holds information needed for OMCI communication (to/from OLT Adapter)
type OmciCC struct {
	pBaseDeviceHandler IdeviceHandler
	pOnuDeviceEntry    IonuDeviceEntry
	pOnuAlarmManager   IonuAlarmManager
	coreClient         *vgrpc.Client
	lowPrioTxQueue     *list.List
	highPrioTxQueue    *list.List
	rxSchedulerMap     map[uint16]CallbackPairEntry
	monitoredRequests  map[uint16]OmciTransferStructure
	deviceID           string
	confFailMEs        []me.ClassID
	mutexConfFailMEs   sync.RWMutex

	mutexCounters sync.RWMutex
	mutexMonReq   sync.RWMutex
	countersBase  txRxCounters
	countersExt   txRxCounters

	// OMCI params
	mutexTid   sync.Mutex
	mutexHpTid sync.Mutex

	mutexSendQueuedRequests sync.Mutex
	mutexLowPrioTxQueue     sync.Mutex
	mutexHighPrioTxQueue    sync.Mutex
	mutexRxSchedMap         sync.Mutex
	txRetries               uint32
	txTimeouts              uint32

	tid            uint16
	hpTid          uint16
	UploadSequNo   uint16
	UploadNoOfCmds uint16

	enabled          bool
	supportExtMsg    bool
	rxOmciFrameError tOmciReceiveError
}

var responsesWithMibDataSync = []omci.MessageType{
	omci.CreateResponseType,
	omci.DeleteResponseType,
	omci.SetResponseType,
	omci.StartSoftwareDownloadResponseType,
	omci.EndSoftwareDownloadResponseType,
	omci.ActivateSoftwareResponseType,
	omci.CommitSoftwareResponseType,
}

// NewOmciCC constructor returns a new instance of a OmciCC
// mib_db (as well as not inluded alarm_db not really used in this code? VERIFY!!)
func NewOmciCC(ctx context.Context, deviceID string, deviceHandler IdeviceHandler,
	onuDeviceEntry IonuDeviceEntry, onuAlarmManager IonuAlarmManager,
	coreClient *vgrpc.Client) *OmciCC {
	logger.Debugw(ctx, "init-omciCC", log.Fields{"device-id": deviceID})
	var omciCC OmciCC
	omciCC.enabled = false
	omciCC.pBaseDeviceHandler = deviceHandler
	omciCC.pOnuAlarmManager = onuAlarmManager
	omciCC.pOnuDeviceEntry = onuDeviceEntry
	omciCC.deviceID = deviceID
	omciCC.coreClient = coreClient
	omciCC.supportExtMsg = false
	omciCC.rxOmciFrameError = cOmciMessageReceiveNoError
	omciCC.confFailMEs = nil
	omciCC.countersBase = txRxCounters{0, 0, 0, 0}
	omciCC.countersExt = txRxCounters{0, 0, 0, 0}
	omciCC.txRetries = 0
	omciCC.txTimeouts = 0
	omciCC.tid = 0x1
	omciCC.hpTid = 0x8000
	omciCC.UploadSequNo = 0
	omciCC.UploadNoOfCmds = 0
	omciCC.lowPrioTxQueue = list.New()
	omciCC.highPrioTxQueue = list.New()
	omciCC.rxSchedulerMap = make(map[uint16]CallbackPairEntry)
	omciCC.monitoredRequests = make(map[uint16]OmciTransferStructure)
	return &omciCC
}

// Stop stops/resets the omciCC
func (oo *OmciCC) Stop(ctx context.Context) error {
	logger.Debugw(ctx, "omciCC-stopping", log.Fields{"device-id": oo.deviceID})
	//reseting all internal data, which might also be helpful for discarding any lingering tx/rx requests
	oo.CancelRequestMonitoring(ctx)
	// clear the tx queues
	oo.mutexHighPrioTxQueue.Lock()
	oo.highPrioTxQueue.Init()
	oo.mutexHighPrioTxQueue.Unlock()
	oo.mutexLowPrioTxQueue.Lock()
	oo.lowPrioTxQueue.Init()
	oo.mutexLowPrioTxQueue.Unlock()
	//clear the scheduler map
	oo.mutexRxSchedMap.Lock()
	for k := range oo.rxSchedulerMap {
		delete(oo.rxSchedulerMap, k)
	}
	oo.mutexRxSchedMap.Unlock()
	//reset the high prio transactionId
	oo.mutexHpTid.Lock()
	oo.hpTid = 0x8000
	oo.mutexHpTid.Unlock()
	//reset the low prio transactionId
	oo.mutexTid.Lock()
	oo.tid = 1
	oo.mutexTid.Unlock()
	//reset control values
	oo.UploadSequNo = 0
	oo.UploadNoOfCmds = 0
	oo.rxOmciFrameError = cOmciMessageReceiveNoError
	oo.ResetConfFailMEs()

	//reset the stats counter
	oo.mutexCounters.Lock()
	oo.countersBase = txRxCounters{0, 0, 0, 0}
	oo.countersExt = txRxCounters{0, 0, 0, 0}
	oo.txRetries = 0
	oo.txTimeouts = 0
	oo.mutexCounters.Unlock()
	return nil
}

// Rx handler for omci messages
func (oo *OmciCC) receiveOnuMessage(ctx context.Context, omciMsg *omci.OMCI, packet *gopacket.Packet) error {
	logger.Debugw(ctx, "rx-onu-autonomous-message", log.Fields{"omciMsgType": omciMsg.MessageType,
		"payload": hex.EncodeToString(omciMsg.Payload)})
	switch omciMsg.MessageType {
	case omci.AlarmNotificationType:
		data := OmciMessage{
			OmciMsg:    omciMsg,
			OmciPacket: packet,
		}
		go oo.pOnuAlarmManager.HandleOmciAlarmNotificationMessage(ctx, data)
		return nil
	default:
		return fmt.Errorf("receiveOnuMessageType %s unimplemented", omciMsg.MessageType.String())
	}
	/*
			msgType = rxFrame.fields["message_type"] //assumed OmciOperationsValue
			rxOnuFrames++

			switch msgType {
			case AlarmNotification:
				{
					logger.Info("Unhandled: received-onu-alarm-message")
					// python code was:
					//if msg_type == EntityOperations.AlarmNotification.value:
					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Alarm_Notification)
					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
					//
					return errors.New("RxAlarmNotification unimplemented")
				}
			case AttributeValueChange:
				{
					logger.Info("Unhandled: received-attribute-value-change")
					// python code was:
					//elif msg_type == EntityOperations.AttributeValueChange.value:
					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.AVC_Notification)
					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
					//
					return errors.New("RxAttributeValueChange unimplemented")
				}
			case TestResult:
				{
					logger.Info("Unhandled: received-test-result")
					// python code was:
					//elif msg_type == EntityOperations.TestResult.value:
					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Test_Result)
					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
					//
					return errors.New("RxTestResult unimplemented")
				}
			default:
				{
					logger.Errorw(ctx,"rx-onu-unsupported-autonomous-message", log.Fields{"msgType": msgType})
					rxOnuDiscards++
					return errors.New("RxOnuMsgType unimplemented")
				}
		    }
	*/
}

func (oo *OmciCC) printRxMessage(ctx context.Context, rxMsg []byte) {
	//assuming omci message content is hex coded!
	// with restricted output of 16bytes would be ...rxMsg[:16]
	logger.Debugw(ctx, "omci-message-received:", log.Fields{
		"RxOmciMessage": hex.EncodeToString(rxMsg),
		"device-id":     oo.deviceID})
}

// ReceiveMessage - Rx handler for onu messages
//
//	e.g. would call ReceiveOnuMessage() in case of TID=0 or Action=test ...
//
// nolint: gocyclo
func (oo *OmciCC) ReceiveMessage(ctx context.Context, rxMsg []byte) error {
	//logger.Debugw(ctx,"cc-receive-omci-message", log.Fields{"RxOmciMessage-x2s": hex.EncodeToString(rxMsg)})

	if len(rxMsg) < 10 {
		logger.Errorw(ctx, "rxOmciMessage has wrong length in general - abort",
			log.Fields{"Length": len(rxMsg), "device-id": oo.deviceID})
		if len(rxMsg) > 0 {
			oo.printRxMessage(ctx, rxMsg)
		}
		return fmt.Errorf("rxOmciMessage has wrong length in general - abort %s", oo.deviceID)
	}
	if rxMsg[cOmciDeviceIdentifierPos] == byte(omci.BaselineIdent) {
		if len(rxMsg) >= 44 { // then it should normally include the BaseFormat trailer Len
			// NOTE: autocorrection only valid for OmciBaseFormat, which is not specifically verified here!!!
			//  (an extendedFormat message could be destroyed this way!)
			trailerLenData := rxMsg[42:44]
			trailerLen := binary.BigEndian.Uint16(trailerLenData)
			//logger.Debugw(ctx,"omci-received-trailer-len", log.Fields{"Length": trailerLen})
			if trailerLen != cOmciBaseMessageTrailerLen { // invalid base Format entry -> autocorrect
				binary.BigEndian.PutUint16(rxMsg[42:44], cOmciBaseMessageTrailerLen)
				if oo.rxOmciFrameError != cOmciMessageReceiveErrorTrailerLen {
					//do just one error log, expectation is: if seen once it should appear regularly - avoid to many log entries
					logger.Errorw(ctx, "wrong omci-message trailer length: trailer len auto-corrected",
						log.Fields{"trailer-length": trailerLen, "device-id": oo.deviceID})
					oo.rxOmciFrameError = cOmciMessageReceiveErrorTrailerLen
				}
			}
		} else if len(rxMsg) >= cOmciBaseMessageTrailerLen { // workaround for Adtran OLT Sim, which currently does not send trailer bytes at all!
			// NOTE: autocorrection only valid for OmciBaseFormat, which is not specifically verified here!!!
			//  (an extendedFormat message could be destroyed this way!)
			// extend/overwrite with trailer
			trailer := make([]byte, 8)
			binary.BigEndian.PutUint16(trailer[2:], cOmciBaseMessageTrailerLen) //set the defined baseline length
			rxMsg = append(rxMsg[:cOmciBaseMessageTrailerLen], trailer...)
			if oo.rxOmciFrameError != cOmciMessageReceiveErrorMissTrailer {
				//do just one error log, expectation is: if seen once it should appear regularly - avoid to many log entries
				logger.Errorw(ctx, "omci-message to short to include trailer len: trailer auto-corrected (added)",
					log.Fields{"message-length": len(rxMsg), "device-id": oo.deviceID})
				oo.rxOmciFrameError = cOmciMessageReceiveErrorMissTrailer
			}
		} else {
			logger.Errorw(ctx, "received omci-message too small for OmciBaseFormat - abort",
				log.Fields{"Length": len(rxMsg), "device-id": oo.deviceID})
			oo.printRxMessage(ctx, rxMsg)
			return fmt.Errorf("rxOmciMessage too small for BaseFormat %s", oo.deviceID)
		}
	} else if rxMsg[cOmciDeviceIdentifierPos] == byte(omci.ExtendedIdent) {
		if len(rxMsg) > 1980 {
			logger.Errorw(ctx, "rxOmciMessage has wrong length for OmciExtendedFormat - abort",
				log.Fields{"Length": len(rxMsg), "device-id": oo.deviceID})
			oo.printRxMessage(ctx, rxMsg)
			return fmt.Errorf("rxOmciMessage has wrong length for OmciExtendedFormat %s", oo.deviceID)
		}
	} else {
		logger.Errorw(ctx, "rxOmciMessage has wrong Device Identifier - abort",
			log.Fields{"Length": len(rxMsg), "device-id": oo.deviceID})
		oo.printRxMessage(ctx, rxMsg)
		return fmt.Errorf("rxOmciMessage has wrong Device Identifier %s", oo.deviceID)
	}
	decodeOptions := gopacket.DecodeOptions{
		Lazy:   true,
		NoCopy: true,
	}
	packet := gopacket.NewPacket(rxMsg, omci.LayerTypeOMCI, decodeOptions)
	if packet == nil {
		logger.Errorw(ctx, "omci-message could not be decoded", log.Fields{"device-id": oo.deviceID})
		oo.printRxMessage(ctx, rxMsg)
		return fmt.Errorf("could not decode rxMsg as OMCI %s", oo.deviceID)
	}
	omciLayer := packet.Layer(omci.LayerTypeOMCI)
	if omciLayer == nil {
		logger.Errorw(ctx, "omci-message could not decode omci layer", log.Fields{"device-id": oo.deviceID})
		oo.printRxMessage(ctx, rxMsg)
		return fmt.Errorf("could not decode omci layer %s", oo.deviceID)
	}
	// insert some check on detected OMCI decoding issues and log them
	// e.g. should indicate problems when detecting some unknown attribute mask content (independent from message type)
	//   even though allowed from omci-lib due to set relaxed decoding
	// application may dig into further details if wanted/needed on their own [but info is not transferred from here so far]
	//   (compare mib_sync.go unknownAttrLayer)
	errLayer := packet.Layer(gopacket.LayerTypeDecodeFailure)
	if failure, decodeOk := errLayer.(*gopacket.DecodeFailure); decodeOk {
		errMsg := failure.Error()
		logger.Warnw(ctx, "Detected decode issue on received OMCI frame", log.Fields{
			"device-id": oo.deviceID, "issue": errMsg})
	}
	//anyway try continue OMCI decoding further on message type layer
	omciMsg, ok := omciLayer.(*omci.OMCI)
	if !ok {
		logger.Errorw(ctx, "omci-message could not assign omci layer", log.Fields{"device-id": oo.deviceID})
		oo.printRxMessage(ctx, rxMsg)
		return fmt.Errorf("could not assign omci layer %s", oo.deviceID)
	}
	logger.Debugw(ctx, "omci-message-decoded:", log.Fields{"omciMsgType": omciMsg.MessageType,
		"transCorrId": strconv.FormatInt(int64(omciMsg.TransactionID), 16),
		"DeviceIdent": omciMsg.DeviceIdentifier, "device-id": oo.deviceID})

	// TestResult is asynchronous indication that carries the same TID as the TestResponse.
	// We expect to find the TID in the oo.rxSchedulerMap
	if byte(omciMsg.MessageType)&me.AK == 0 && omciMsg.MessageType != omci.TestResultType {
		// Not a response
		oo.printRxMessage(ctx, rxMsg)
		logger.Debugw(ctx, "RxMsg is no Omci Response Message", log.Fields{"device-id": oo.deviceID})
		if omciMsg.TransactionID == 0 {
			if rxMsg[cOmciDeviceIdentifierPos] == byte(omci.BaselineIdent) {
				oo.incrementBaseRxNoAkFrames()
			} else {
				oo.incrementExtRxNoAkFrames()
			}
			return oo.receiveOnuMessage(ctx, omciMsg, &packet)
		}
		logger.Errorw(ctx, "Unexpected TransCorrId != 0  not accepted for autonomous messages",
			log.Fields{"msgType": omciMsg.MessageType, "payload": hex.EncodeToString(omciMsg.Payload),
				"device-id": oo.deviceID})
		return fmt.Errorf("autonomous Omci Message with TranSCorrId != 0 not acccepted %s", oo.deviceID)
	}
	//logger.Debug(ctx,"RxMsg is a Omci Response Message: try to schedule it to the requester")
	oo.mutexRxSchedMap.Lock()
	rxCallbackEntry, ok := oo.rxSchedulerMap[omciMsg.TransactionID]
	if ok && rxCallbackEntry.CbFunction != nil {

		if rxCallbackEntry.FramePrint {
			oo.printRxMessage(ctx, rxMsg)
		}
		if rxMsg[cOmciDeviceIdentifierPos] == byte(omci.BaselineIdent) {
			oo.incrementBaseRxAkFrames()
		} else {
			oo.incrementExtRxAkFrames()
		}
		//disadvantage of decoupling: error verification made difficult, but anyway the question is
		// how to react on erroneous frame reception, maybe can simply be ignored
		go func() {
			_ = rxCallbackEntry.CbFunction(ctx, omciMsg, &packet, rxCallbackEntry.CbRespChannel)
		}()
		isSuccessfulResponse, err := oo.isSuccessfulResponseWithMibDataSync(ctx, omciMsg, &packet)
		if err != nil {
			// qualified error logging already done in function above
			if !rxCallbackEntry.FramePrint {
				oo.printRxMessage(ctx, rxMsg)
			}
			return fmt.Errorf("could not decode further layers %s", oo.deviceID)
		}
		if isSuccessfulResponse {
			oo.pOnuDeviceEntry.IncrementMibDataSync(ctx)
		} else {
			logger.Debugw(ctx, "mibDataSync counter not to be updated for this message type",
				log.Fields{"omciMsg.MessageType": omciMsg.MessageType, "device-id": oo.deviceID})
		}

		// If omciMsg.MessageType is omci.TestResponseType, we still expect the TestResult OMCI message,
		// so do not clean up the TransactionID in that case.
		if omciMsg.MessageType != omci.TestResponseType {
			// having posted the response the request is regarded as 'done'
			delete(oo.rxSchedulerMap, omciMsg.TransactionID)
		}
		oo.mutexRxSchedMap.Unlock()
		return nil
	}
	oo.mutexRxSchedMap.Unlock()
	logger.Errorw(ctx, "omci-message-response for not registered transCorrId", log.Fields{"device-id": oo.deviceID})
	oo.printRxMessage(ctx, rxMsg)
	return fmt.Errorf("could not find registered response handler tor transCorrId %s", oo.deviceID)

	/* py code was:
	           Receive and OMCI message from the proxy channel to the OLT.

	           Call this from your ONU Adapter on a new OMCI Rx on the proxy channel
	           :param msg: (str) OMCI binary message (used as input to Scapy packet decoder)
	           """
	           if not self.enabled:
	               return

	           try:
	               now = arrow.utcnow()
	               d = None

	               # NOTE: Since we may need to do an independent ME map on a per-ONU basis
	               #       save the current value of the entity_id_to_class_map, then
	               #       replace it with our custom one before decode, and then finally
	               #       restore it later. Tried other ways but really made the code messy.
	               saved_me_map = omci_entities.entity_id_to_class_map
	               omci_entities.entity_id_to_class_map = self._me_map

	               try:
	                   rx_frame = msg if isinstance(msg, OmciFrame) else OmciFrame(msg)
	                   self.logger.debug('recv-omci-msg', omci_msg=hexlify(msg))
	               except KeyError as e:
	                   # Unknown, Unsupported, or vendor-specific ME. Key is the unknown classID
	                   self.logger.debug('frame-decode-key-error', omci_msg=hexlify(msg), e=e)
	                   rx_frame = self._decode_unknown_me(msg)
	                   self._rx_unknown_me += 1

	               except Exception as e:
	                   self.logger.exception('frame-decode', omci_msg=hexlify(msg), e=e)
	                   return

	               finally:
	                   omci_entities.entity_id_to_class_map = saved_me_map     # Always restore it.

	               rx_tid = rx_frame.fields['transaction_id']
	               msg_type = rx_frame.fields['message_type']
	               self.logger.debug('Received message for rx_tid', rx_tid = rx_tid, msg_type = msg_type)
	               # Filter the Test Result frame and route through receive onu
	               # message method.
	               if rx_tid == 0 or msg_type == EntityOperations.TestResult.value:
	                   self.logger.debug('Receive ONU message', rx_tid=0)
	                   return self._receive_onu_message(rx_frame)

	               # Previously unreachable if this is the very first round-trip Rx or we
	               # have been running consecutive errors
	               if self._rx_frames == 0 or self._consecutive_errors != 0:
	                   self.logger.debug('Consecutive errors for rx', err = self._consecutive_errors)
	                   self.reactor.callLater(0, self._publish_connectivity_event, True)

	               self._rx_frames += 1
	               self._consecutive_errors = 0

	               try:
	                   high_priority = self._tid_is_high_priority(rx_tid)
	                   index = self._get_priority_index(high_priority)

	                   # (timestamp, defer, frame, timeout, retry, delayedCall)
	                   last_tx_tuple = self._tx_request[index]

	                   if last_tx_tuple is None or \
	                           last_tx_tuple[OMCI_CC.REQUEST_FRAME].fields.get('transaction_id') != rx_tid:
	                       # Possible late Rx on a message that timed-out
	                       if last_tx_tuple:
	                           self.logger.debug('Unknown message', rx_tid=rx_tid,
	                                          tx_id=last_tx_tuple[OMCI_CC.REQUEST_FRAME].fields.get('transaction_id'))
	                       self._rx_unknown_tid += 1
	                       self._rx_late += 1
	                       return

	                   ts, d, tx_frame, timeout, retry, dc = last_tx_tuple
	                   if dc is not None and not dc.cancelled and not dc.called:
	                       dc.cancel()

	                   _secs = self._update_rx_tx_stats(now, ts)

	                   # Late arrival already serviced by a timeout?
	                   if d.called:
	                       self._rx_late += 1
	                       self.logger.debug('Serviced by timeout. Late arrival', rx_late = self._rx_late)
	                       return

	               except Exception as e:
	                   self.logger.exception('frame-match', msg=hexlify(msg), e=e)
	                   if d is not None:
	                       return d.errback(failure.Failure(e))
	                   return

	               # Publish Rx event to listeners in a different task
	               self.logger.debug('Publish rx event', rx_tid = rx_tid,
	                              tx_tid = tx_frame.fields['transaction_id'])
	               reactor.callLater(0, self._publish_rx_frame, tx_frame, rx_frame)

	               # begin success callback chain (will cancel timeout and queue next Tx message)
	               self._rx_response[index] = rx_frame
	               d.callback(rx_frame)

	           except Exception as e:
	   			self.logger.exception('rx-msg', e=e)
	*/
}

/*
func (oo *omciCC) publishRxResponseFrame(ctx context.Context, txFrame []byte, rxFrame []byte) error {
	return errors.New("publishRxResponseFrame unimplemented")
		//def _publish_rx_frame(self, tx_frame, rx_frame):
}
*/

// ReleaseTid releases OMCI transaction identifier from rxSchedulerMap
func (oo *OmciCC) ReleaseTid(ctx context.Context, tid uint16) {
	logger.Debugw(ctx, "releasing tid from rxSchedulerMap", log.Fields{"tid": tid})
	delete(oo.rxSchedulerMap, tid)
}

// Send - Queue the OMCI Frame for a transmit to the ONU via the proxy_channel
func (oo *OmciCC) Send(ctx context.Context, txFrame []byte, timeout int, retry int, highPrio bool,
	receiveCallbackPair CallbackPair) error {

	if timeout != 0 {
		logger.Debugw(ctx, "register-response-callback:", log.Fields{"for TransCorrId": receiveCallbackPair.CbKey})
		oo.mutexRxSchedMap.Lock()
		// it could be checked, if the callback key is already registered - but simply overwrite may be acceptable ...
		oo.rxSchedulerMap[receiveCallbackPair.CbKey] = receiveCallbackPair.CbEntry
		oo.mutexRxSchedMap.Unlock()
	} //else timeout 0 indicates that no response is expected - fire and forget

	printFrame := receiveCallbackPair.CbEntry.FramePrint //printFrame true means debug print of frame is requested
	//just use a simple list for starting - might need some more effort, especially for multi source write access
	omciTxRequest := OmciTransferStructure{
		chSuccess:      make(chan bool),
		OnuSwWindow:    nil,
		cbPair:         receiveCallbackPair,
		txFrame:        txFrame,
		timeout:        timeout,
		retries:        retry,
		highPrio:       highPrio,
		withFramePrint: printFrame,
	}
	oo.mutexMonReq.Lock()
	defer oo.mutexMonReq.Unlock()
	if _, exist := oo.monitoredRequests[receiveCallbackPair.CbKey]; !exist {
		// do not call processRequestMonitoring in background here to ensure correct sequencing
		// of requested messages into txQueue (especially for non-response-supervised messages)
		oo.processRequestMonitoring(ctx, omciTxRequest)
		return nil
	}
	logger.Errorw(ctx, "A message with this tid is processed already!",
		log.Fields{"tid": receiveCallbackPair.CbKey, "device-id": oo.deviceID})
	return fmt.Errorf("message with tid is processed already %s", oo.deviceID)
}

func (oo *OmciCC) sendQueuedRequests(ctx context.Context) {
	// Avoid accessing the txQueues from parallel send routines to block
	// parallel omci send requests at least until SendIAP is 'committed'.
	// To guarantee window size 1 for one ONU it would be necessary to wait
	// for the corresponding response too (t.b.d.).
	oo.mutexSendQueuedRequests.Lock()
	defer oo.mutexSendQueuedRequests.Unlock()
	if err := oo.sendQueuedHighPrioRequests(ctx); err != nil {
		logger.Errorw(ctx, "Error during sending high prio requests!",
			log.Fields{"err": err, "device-id": oo.deviceID})
		return
	}
	if err := oo.sendQueuedLowPrioRequests(ctx); err != nil {
		logger.Errorw(ctx, "Error during sending low prio requests!",
			log.Fields{"err": err, "device-id": oo.deviceID})
		return
	}
}

func (oo *OmciCC) sendQueuedHighPrioRequests(ctx context.Context) error {
	oo.mutexHighPrioTxQueue.Lock()
	defer oo.mutexHighPrioTxQueue.Unlock()
	for oo.highPrioTxQueue.Len() > 0 {
		select {
		case _, ok := <-oo.pBaseDeviceHandler.GetDeviceDeleteCommChan(ctx):
			if !ok {
				return fmt.Errorf("device deletion channel is closed at sendQueuedHighPrioRequests %s", oo.deviceID)
			}
		default:
			queueElement := oo.highPrioTxQueue.Front() // First element
			if err := oo.sendOMCIRequest(ctx, queueElement.Value.(OmciTransferStructure)); err != nil {
				// Element will be removed from the queue regardless of the send success, to prevent
				// an accumulation of send requests for the same message in the event of an error.
				// In this case, resend attempts for the message are ensured by our retry
				// mechanism after omci-timeout.
				oo.highPrioTxQueue.Remove(queueElement) // Dequeue
				//Remove the call back from the rxSchedulerMap
				oo.mutexRxSchedMap.Lock()
				delete(oo.rxSchedulerMap, queueElement.Value.(OmciTransferStructure).cbPair.CbKey)
				oo.mutexRxSchedMap.Unlock()
				return err
			}
			oo.highPrioTxQueue.Remove(queueElement) // Dequeue
		}
	}
	return nil
}

func (oo *OmciCC) sendQueuedLowPrioRequests(ctx context.Context) error {
	oo.mutexLowPrioTxQueue.Lock()
	for oo.lowPrioTxQueue.Len() > 0 {
		select {
		case _, ok := <-oo.pBaseDeviceHandler.GetDeviceDeleteCommChan(ctx):
			if !ok {
				oo.mutexLowPrioTxQueue.Unlock()
				return fmt.Errorf("device deletion channel is closed at sendQueuedLowPrioRequests %s", oo.deviceID)
			}
		default:
			queueElement := oo.lowPrioTxQueue.Front() // First element
			// check if the element is for onu sw section
			aOmciTxReq := queueElement.Value.(OmciTransferStructure)
			if aOmciTxReq.OnuSwWindow != nil {
				if err := oo.sendOnuSwSectionsOfWindow(ctx, aOmciTxReq); err != nil {
					// Element will be removed from the queue regardless of the send success, to prevent
					// an accumulation of send requests for the same message in the event of an error.
					// In this case, resend attempts for the message are ensured by our retry
					// mechanism after omci-timeout.
					oo.lowPrioTxQueue.Remove(queueElement) // Dequeue
					oo.mutexLowPrioTxQueue.Unlock()
					//Remove the call back from the rxSchedulerMap
					oo.mutexRxSchedMap.Lock()
					delete(oo.rxSchedulerMap, queueElement.Value.(OmciTransferStructure).cbPair.CbKey)
					oo.mutexRxSchedMap.Unlock()
					return err
				}
			} else {
				err := oo.sendOMCIRequest(ctx, queueElement.Value.(OmciTransferStructure))
				if err != nil {
					// Element will be removed from the queue regardless of the send success, to prevent
					// an accumulation of send requests for the same message in the event of an error.
					// In this case, resend attempts for the message are ensured by our retry
					// mechanism after omci-timeout.
					oo.lowPrioTxQueue.Remove(queueElement) // Dequeue
					oo.mutexLowPrioTxQueue.Unlock()
					oo.mutexRxSchedMap.Lock()
					delete(oo.rxSchedulerMap, queueElement.Value.(OmciTransferStructure).cbPair.CbKey)
					oo.mutexRxSchedMap.Unlock()
					return err
				}
			}
			oo.lowPrioTxQueue.Remove(queueElement) // Dequeue
			// Interrupt the sending of low priority requests to process any high priority requests
			// that may have arrived in the meantime
			oo.mutexLowPrioTxQueue.Unlock()
			if err := oo.sendQueuedHighPrioRequests(ctx); err != nil {
				return err
			}
			oo.mutexLowPrioTxQueue.Lock()
		}
	}

	oo.mutexLowPrioTxQueue.Unlock()
	return nil
}

func (oo *OmciCC) sendOMCIRequest(ctx context.Context, omciTxRequest OmciTransferStructure) error {
	if omciTxRequest.withFramePrint {
		logger.Debugw(ctx, "omci-message-to-send:", log.Fields{
			"TxOmciMessage": hex.EncodeToString(omciTxRequest.txFrame),
			"device-id":     oo.deviceID,
			"toDeviceType":  oo.pBaseDeviceHandler.GetProxyAddressType(),
			"proxyDeviceID": oo.pBaseDeviceHandler.GetProxyAddressID(),
			"proxyAddress":  oo.pBaseDeviceHandler.GetProxyAddress()})
	}
	omciMsg := &ia.OmciMessage{
		ParentDeviceId: oo.pBaseDeviceHandler.GetProxyAddressID(),
		ChildDeviceId:  oo.deviceID,
		Message:        omciTxRequest.txFrame,
		ProxyAddress:   oo.pBaseDeviceHandler.GetProxyAddress(),
		ConnectStatus:  common.ConnectStatus_REACHABLE, // If we are sending OMCI messages means we are connected, else we should not be here
	}
	sendErr := oo.pBaseDeviceHandler.SendOMCIRequest(ctx, oo.pBaseDeviceHandler.GetProxyAddress().AdapterEndpoint, omciMsg)
	if sendErr != nil {
		logger.Errorw(ctx, "send omci request error", log.Fields{"device-id": oo.deviceID, "ChildId": oo.deviceID, "error": sendErr})
		return sendErr
	}
	if omciTxRequest.txFrame[cOmciDeviceIdentifierPos] == byte(omci.BaselineIdent) {
		oo.incrementBaseTxArFrames()
	} else {
		oo.incrementExtTxArFrames()
	}
	return nil
}

// GetNextTid - TODO: add comment
func (oo *OmciCC) GetNextTid(highPriority bool) uint16 {
	var next uint16
	if highPriority {
		oo.mutexHpTid.Lock()
		next = oo.hpTid
		oo.hpTid++
		if oo.hpTid < 0x8000 {
			oo.hpTid = 0x8000
		}
		oo.mutexHpTid.Unlock()
	} else {
		oo.mutexTid.Lock()
		next = oo.tid
		oo.tid++
		if oo.tid >= 0x8000 {
			oo.tid = 1
		}
		oo.mutexTid.Unlock()
	}
	return next
}

// GetOnuSwSecNextTid get the next low prio tid for the onu sw sections
// onu sw sections uses only low priority tids
// The mutexTid lock should be taken prior to using this function
func (oo *OmciCC) GetOnuSwSecNextTid() uint16 {
	if oo.tid >= 0x8000 {
		oo.tid = 1
	}
	next := oo.tid
	oo.tid++
	return next
}

// GetOnuSwSecLastTid gets the last allocated tid
// The mutexTid lock should be taken prior to using this function
func (oo *OmciCC) GetOnuSwSecLastTid() uint16 {
	next := oo.tid
	lastAllocatedTid := next - 1
	return lastAllocatedTid
}

// LockMutexTID locks mutexTid
func (oo *OmciCC) LockMutexTID() {
	oo.mutexTid.Lock()
}

// UnLockMutexTID unlocks mutexTid
func (oo *OmciCC) UnLockMutexTID() {
	oo.mutexTid.Unlock()
}

// ###################################################################################
// # utility methods provided to work on OMCI messages

// Serialize - TODO: add comment
func Serialize(ctx context.Context, msgType omci.MessageType, request gopacket.SerializableLayer, tid uint16) ([]byte, error) {
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   msgType,
	}
	return SerializeOmciLayer(ctx, omciLayer, request)
}

// SerializeOmciLayer - TODO: add comment
func SerializeOmciLayer(ctx context.Context, aOmciLayer *omci.OMCI, aRequest gopacket.SerializableLayer) ([]byte, error) {
	var options gopacket.SerializeOptions
	options.FixLengths = true

	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, aOmciLayer, aRequest)
	if err != nil {
		logger.Errorw(ctx, "Could not create goPacket Omci serial buffer", log.Fields{"Err": err})
		return nil, err
	}
	return buffer.Bytes(), nil
}

/*
func hexEncode(omciPkt []byte) ([]byte, error) {
	dst := make([]byte, hex.EncodedLen(len(omciPkt)))
	hex.Encode(dst, omciPkt)
	return dst, nil
}
*/

// supply a response handler for omci response messages to be transferred to the requested FSM
func (oo *OmciCC) receiveOmciResponse(ctx context.Context, omciMsg *omci.OMCI, packet *gopacket.Packet, respChan chan Message) error {

	logger.Debugw(ctx, "omci-message-response - transfer on omciRespChannel", log.Fields{"omciMsgType": omciMsg.MessageType,
		"transCorrId": strconv.FormatInt(int64(omciMsg.TransactionID), 16), "device-id": oo.deviceID})

	if oo.pOnuDeviceEntry == nil {
		logger.Errorw(ctx, "Abort receiving OMCI response, DeviceEntryPointer is nil", log.Fields{
			"device-id": oo.deviceID})
		return fmt.Errorf("deviceEntryPointer is nil %s", oo.deviceID)
	}
	oo.mutexMonReq.RLock()
	if _, exist := oo.monitoredRequests[omciMsg.TransactionID]; exist {
		//implement non-blocking channel send to avoid blocking on mutexMonReq later
		select {
		case oo.monitoredRequests[omciMsg.TransactionID].chSuccess <- true:
		default:
			logger.Debugw(ctx, "response not send on omciRespChannel (no receiver)", log.Fields{
				"transCorrId": strconv.FormatInt(int64(omciMsg.TransactionID), 16), "device-id": oo.deviceID})
		}
	} else {
		logger.Infow(ctx, "reqMon: map entry does not exist!",
			log.Fields{"tid": omciMsg.TransactionID, "device-id": oo.deviceID})
	}
	oo.mutexMonReq.RUnlock()

	// no further test on SeqNo is done here, assignment from rxScheduler is trusted
	// MibSync responses are simply transferred via deviceEntry to MibSync, no specific analysis here
	omciRespMsg := Message{
		Type: OMCI,
		Data: OmciMessage{
			OmciMsg:    omciMsg,
			OmciPacket: packet,
		},
	}
	//logger.Debugw(ctx,"Message to be sent into channel:", log.Fields{"mibSyncMsg": mibSyncMsg})
	respChan <- omciRespMsg

	return nil
}

// SendMibReset sends MibResetRequest
func (oo *OmciCC) SendMibReset(ctx context.Context, timeout int, highPrio bool) error {

	logger.Infow(ctx, "send MibReset-msg to:", log.Fields{"device-id": oo.deviceID})
	request := &omci.MibResetRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuDataClassID,
		},
	}
	tid := oo.GetNextTid(highPrio)
	pkt, err := Serialize(ctx, omci.MibResetRequestType, request, tid)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize MibResetRequest", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibUploadFsmCommChan(), oo.receiveOmciResponse, true},
	}
	return oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
}

// SendReboot sends RebootRequest
func (oo *OmciCC) SendReboot(ctx context.Context, timeout int, highPrio bool, responseChannel chan Message) error {
	logger.Debugw(ctx, "send reboot-msg to:", log.Fields{"device-id": oo.deviceID})
	request := &omci.RebootRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuGClassID,
		},
	}
	tid := oo.GetNextTid(highPrio)
	pkt, err := Serialize(ctx, omci.RebootRequestType, request, tid)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize RebootRequest", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetOmciRebootMsgRevChan(), oo.receiveOmciResponse, true},
	}

	err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send RebootRequest", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	err = oo.pOnuDeviceEntry.WaitForRebootResponse(ctx, responseChannel)
	if err != nil {
		logger.Errorw(ctx, "aborting ONU reboot!", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	return nil
}

// SendMibUpload sends MibUploadRequest
func (oo *OmciCC) SendMibUpload(ctx context.Context, timeout int, highPrio bool, isExtOmciSupported bool) error {
	logger.Debugw(ctx, "send MibUpload-msg to:", log.Fields{"device-id": oo.deviceID})

	tid := oo.GetNextTid(highPrio)

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.MibUploadRequestType,
	}
	if isExtOmciSupported {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.MibUploadRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuDataClassID,
			Extended:    isExtOmciSupported,
		},
	}
	var options gopacket.SerializeOptions
	options.FixLengths = true

	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize MibUploadRequest", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	oo.UploadSequNo = 0
	oo.UploadNoOfCmds = 0

	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibUploadFsmCommChan(), oo.receiveOmciResponse, true},
	}
	return oo.Send(ctx, buffer.Bytes(), timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
}

// SendMibUploadNext sends MibUploadNextRequest
func (oo *OmciCC) SendMibUploadNext(ctx context.Context, timeout int, highPrio bool, isExtOmciSupported bool) error {
	logger.Debugw(ctx, "send MibUploadNext-msg to:", log.Fields{"device-id": oo.deviceID, "UploadSequNo": oo.UploadSequNo})

	tid := oo.GetNextTid(highPrio)

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.MibUploadNextRequestType,
	}
	if isExtOmciSupported {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.MibUploadNextRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuDataClassID,
			Extended:    isExtOmciSupported,
		},
		CommandSequenceNumber: oo.UploadSequNo,
	}
	var options gopacket.SerializeOptions
	options.FixLengths = true

	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize MibUploadNextRequest", log.Fields{
			"Err": err, "device-id": oo.deviceID})
		return err
	}
	oo.UploadSequNo++

	omciRxCallbackPair := CallbackPair{
		CbKey: tid,
		//frame printing for MibUpload frames disabled now per default to avoid log file abort situations (size/speed?)
		// if wanted, rx frame printing should be specifically done within the MibUpload FSM or controlled via extra parameter
		// compare also software upgrade download section handling
		CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibUploadFsmCommChan(), oo.receiveOmciResponse, true},
	}
	return oo.Send(ctx, buffer.Bytes(), timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
}

// SendGetAllAlarm gets all alarm ME instances
func (oo *OmciCC) SendGetAllAlarm(ctx context.Context, alarmRetreivalMode uint8, timeout int, highPrio bool, isExtendedOmci bool) error {
	logger.Debugw(ctx, "send GetAllAlarms-msg to:", log.Fields{"device-id": oo.deviceID})

	tid := oo.GetNextTid(highPrio)
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.GetAllAlarmsRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
	}
	if isExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.GetAllAlarmsRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuDataClassID,
			Extended:    isExtendedOmci,
		},
		AlarmRetrievalMode: byte(alarmRetreivalMode),
	}
	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize GetAllAlarmsRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	oo.pOnuAlarmManager.ResetAlarmUploadCounters()

	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{oo.pOnuAlarmManager.GetAlarmMgrEventChannel(), oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send GetAllAlarmsRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send GetAllAlarmsRequest done")
	return nil
}

// SendGetAllAlarmNext gets next alarm ME instance
func (oo *OmciCC) SendGetAllAlarmNext(ctx context.Context, timeout int, highPrio bool, isExtendedOmci bool) error {
	alarmUploadSeqNo := oo.pOnuAlarmManager.GetAlarmUploadSeqNo()
	logger.Debugw(ctx, "send SendGetAllAlarmNext-msg to:", log.Fields{"device-id": oo.deviceID,
		"alarmUploadSeqNo": alarmUploadSeqNo})

	tid := oo.GetNextTid(highPrio)
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.GetAllAlarmsNextRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
	}
	if isExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.GetAllAlarmsNextRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuDataClassID,
			Extended:    isExtendedOmci,
		},
		CommandSequenceNumber: alarmUploadSeqNo,
	}
	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize GetAllAlarmsNextRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	oo.pOnuAlarmManager.IncrementAlarmUploadSeqNo()

	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{oo.pOnuAlarmManager.GetAlarmMgrEventChannel(), oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send GetAllAlarmsNextRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send GetAllAlarmsNextRequest done")
	return nil
}

// SendCreateGalEthernetProfile creates GalEthernetProfile ME instance
func (oo *OmciCC) SendCreateGalEthernetProfile(ctx context.Context, timeout int, highPrio bool) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GalEnetProfile-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	meParams := me.ParamData{
		EntityID:   GalEthernetEID,
		Attributes: me.AttributeValueMap{me.GalEthernetProfile_MaximumGemPayloadSize: maxGemPayloadSize},
	}
	meInstance, omciErr := me.NewGalEthernetProfile(meParams)
	if omciErr.GetError() == nil {
		//all setByCreate parameters already set, no default option required ...
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GalEnetProfileInstance for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GalEnetProfile create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibDownloadFsmCommChan(), oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GalEnetProfile create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GalEnetProfile-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GalEnetProfileInstance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetOnu2g sets Onu2G ME instance
// might be needed to extend for parameter arguments, here just for setting the ConnectivityMode!!
func (oo *OmciCC) SendSetOnu2g(ctx context.Context, timeout int, highPrio bool) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send ONU2-G-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	// ONU-G ME-ID is defined to be 0, but we could verify, if the ONU really supports the desired
	//   connectivity mode 5 (in ConnCap)
	// By now we just use fix values to fire - this is anyway what the python adapter does
	// read ONU-2G from DB ???? //TODO!!!
	meParams := me.ParamData{
		EntityID:   0,
		Attributes: me.AttributeValueMap{me.Onu2G_CurrentConnectivityMode: connectivityModeValue},
	}
	meInstance, omciErr := me.NewOnu2G(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode ONU2-G instance for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize ONU2-G set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibDownloadFsmCommChan(), oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ONU2-G set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send ONU2-G-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate ONU2-G", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMBServiceProfile creates MacBridgeServiceProfile ME instance
func (oo *OmciCC) SendCreateMBServiceProfile(ctx context.Context,
	aPUniPort *OnuUniPort, timeout int, highPrio bool) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	instID := MacBridgeServiceProfileEID + uint16(aPUniPort.MacBpNo)
	logger.Debugw(ctx, "send MBSP-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(instID), 16)})

	meParams := me.ParamData{
		EntityID: instID,
		Attributes: me.AttributeValueMap{
			me.MacBridgeServiceProfile_Priority:                   0x8000,
			me.MacBridgeServiceProfile_MaxAge:                     20 * 256, //20s
			me.MacBridgeServiceProfile_HelloTime:                  2 * 256,  //2s
			me.MacBridgeServiceProfile_ForwardDelay:               15 * 256, //15s
			me.MacBridgeServiceProfile_DynamicFilteringAgeingTime: 0,
		},
	}

	meInstance, omciErr := me.NewMacBridgeServiceProfile(meParams)
	if omciErr.GetError() == nil {
		//obviously we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MBSP for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MBSP create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibDownloadFsmCommChan(), oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MBSP create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MBSP-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MBSP Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMBPConfigDataUniSide creates MacBridgePortConfigurationData ME instance
func (oo *OmciCC) SendCreateMBPConfigDataUniSide(ctx context.Context,
	aPUniPort *OnuUniPort, timeout int, highPrio bool) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	instID, idErr := GenerateUNISideMBPCDEID(uint16(aPUniPort.MacBpNo))
	if idErr != nil {
		logger.Errorw(ctx, "Cannot generate MBPCD entity id", log.Fields{
			"Err": idErr, "device-id": oo.deviceID})
		return nil, idErr
	}
	logger.Debugw(ctx, "send MBPCD-Create-msg  for uni side:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(instID), 16), "macBpNo": aPUniPort.MacBpNo})

	meParams := me.ParamData{
		EntityID: instID,
		Attributes: me.AttributeValueMap{
			me.MacBridgePortConfigurationData_BridgeIdPointer: MacBridgeServiceProfileEID + uint16(aPUniPort.MacBpNo),
			me.MacBridgePortConfigurationData_PortNum:         aPUniPort.MacBpNo,
			me.MacBridgePortConfigurationData_TpType:          uint8(aPUniPort.PortType),
			me.MacBridgePortConfigurationData_TpPointer:       aPUniPort.EntityID,
		},
	}
	meInstance, omciErr := me.NewMacBridgePortConfigurationData(meParams)
	if omciErr.GetError() == nil {
		//obviously we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MBPCD for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MBPCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibDownloadFsmCommChan(), oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MBPCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MBPCD-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MBPCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateEVTOConfigData creates ExtendedVlanTaggingOperationConfigurationData ME instance
func (oo *OmciCC) SendCreateEVTOConfigData(ctx context.Context,
	aPUniPort *OnuUniPort, timeout int, highPrio bool) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	//same entityId is used as for MBSP (see there), but just arbitrary ...
	instID := MacBridgeServiceProfileEID + uint16(aPUniPort.MacBpNo)
	logger.Debugw(ctx, "send EVTOCD-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(instID), 16)})

	// compare python adapter code WA VOL-1311: this is not done here!
	//   (setting TPID values for the create would probably anyway be ignored by the omci lib)
	//    but perhaps we have to be aware of possible problems at get(Next) Request handling for EVTOOCD tables later ...
	assType := uint8(2) // default AssociationType is PPTPEthUni
	if aPUniPort.PortType == UniVEIP {
		assType = uint8(10) // for VEIP
	}
	meParams := me.ParamData{
		EntityID: instID,
		Attributes: me.AttributeValueMap{
			me.ExtendedVlanTaggingOperationConfigurationData_AssociationType:     assType,
			me.ExtendedVlanTaggingOperationConfigurationData_AssociatedMePointer: aPUniPort.EntityID,
			//EnhancedMode not yet supported, used with default options
		},
	}
	meInstance, omciErr := me.NewExtendedVlanTaggingOperationConfigurationData(meParams)
	if omciErr.GetError() == nil {
		//all setByCreate parameters already set, no default option required ...
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode EVTOCD for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize EVTOCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{oo.pOnuDeviceEntry.GetMibDownloadFsmCommChan(), oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send EVTOCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send EVTOCD-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate EVTOCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetOnuGLS sets OnuG ME instance
func (oo *OmciCC) SendSetOnuGLS(ctx context.Context, timeout int,
	highPrio bool, requestedAttributes me.AttributeValueMap, rxChan chan Message) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send ONU-G-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	// ONU-G ME-ID is defined to be 0, no need to perform a DB lookup
	meParams := me.ParamData{
		EntityID:   0,
		Attributes: requestedAttributes,
	}
	meInstance, omciErr := me.NewOnuG(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode ONU-G instance for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize ONU-G set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ONU-G set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send ONU-G-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate ONU-G", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetPptpEthUniLS sets PhysicalPathTerminationPointEthernetUni ME instance
func (oo *OmciCC) SendSetPptpEthUniLS(ctx context.Context, aInstNo uint16, timeout int,
	highPrio bool, requestedAttributes me.AttributeValueMap, rxChan chan Message) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send PPTPEthUni-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	// PPTPEthUni ME-ID is taken from Mib Upload stored OnuUniPort instance (argument)
	meParams := me.ParamData{
		EntityID:   aInstNo,
		Attributes: requestedAttributes,
	}
	meInstance, omciErr := me.NewPhysicalPathTerminationPointEthernetUni(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode PPTPEthUni instance for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize PPTPEthUni-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send PPTPEthUni-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send PPTPEthUni-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate PPTPEthUni", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

/* UniG obsolete by now, left here in case it should be needed once again
   UniG AdminState anyway should be ignored by ONU acc. to G988
func (oo *omciCC) sendSetUniGLS(ctx context.Context, aInstNo uint16, timeout int,
	highPrio bool, requestedAttributes me.AttributeValueMap, rxChan chan Message) *me.ManagedEntity {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx,"send UNI-G-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	// UNI-G ME-ID is taken from Mib Upload stored OnuUniPort instance (argument)
	meParams := me.ParamData{
		EntityID:   aInstNo,
		Attributes: requestedAttributes,
	}
	meInstance, omciErr := me.NewUniG(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx,"Cannot encode UNI-G instance for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil
		}

		pkt, err := serializeOmciLayer(omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx,"Cannot serialize UNI-G-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx,"Cannot send UNIG-G-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil
		}
		logger.Debug(ctx,"send UNI-G-Set-msg done")
		return meInstance
	}
	logger.Errorw(ctx,"Cannot generate UNI-G", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil
}
*/

// SendSetVeipLS sets VirtualEthernetInterfacePoint ME instance
func (oo *OmciCC) SendSetVeipLS(ctx context.Context, aInstNo uint16, timeout int,
	highPrio bool, requestedAttributes me.AttributeValueMap, rxChan chan Message) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VEIP-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	// ONU-G ME-ID is defined to be 0, no need to perform a DB lookup
	meParams := me.ParamData{
		EntityID:   aInstNo,
		Attributes: requestedAttributes,
	}
	meInstance, omciErr := me.NewVirtualEthernetInterfacePoint(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VEIP instance for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VEIP-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VEIP-Set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VEIP-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VEIP", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendGetMe gets ME instance
func (oo *OmciCC) SendGetMe(ctx context.Context, classID me.ClassID, entityID uint16, requestedAttributes me.AttributeValueMap,
	timeout int, highPrio bool, rxChan chan Message, isExtendedOmci bool) (*me.ManagedEntity, error) {

	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send get-request-msg", log.Fields{"classID": classID, "device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	meParams := me.ParamData{
		EntityID:   entityID,
		Attributes: requestedAttributes,
	}
	var messageSet = omci.BaselineIdent
	if isExtendedOmci {
		messageSet = omci.ExtendedIdent
	}
	meInstance, omciErr := me.LoadManagedEntityDefinition(classID, meParams)
	if omciErr.GetError() == nil {
		meClassIDName := meInstance.GetName()
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.GetRequestType, oframe.TransactionID(tid), oframe.FrameFormat(messageSet))
		if err != nil {
			logger.Errorf(ctx, "Cannot encode instance for get-request", log.Fields{"meClassIDName": meClassIDName, "Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize get-request", log.Fields{"meClassIDName": meClassIDName, "Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send get-request-msg", log.Fields{"meClassIDName": meClassIDName, "Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debugw(ctx, "send get-request-msg done", log.Fields{"meClassIDName": meClassIDName, "device-id": oo.deviceID})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate meDefinition", log.Fields{"classID": classID, "Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendGetMeWithAttributeMask gets ME instance with attribute mask
func (oo *OmciCC) SendGetMeWithAttributeMask(ctx context.Context, classID me.ClassID, entityID uint16, requestedAttributesMask uint16,
	timeout int, highPrio bool, rxChan chan Message) error {

	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send get-request-msg", log.Fields{"classID": classID, "device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	request := &omci.GetRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityInstance: entityID,
			EntityClass:    classID,
		},
		AttributeMask: requestedAttributesMask,
	}

	pkt, err := Serialize(ctx, omci.GetRequestType, request, tid)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize get-request", log.Fields{"meClassIDName": classID, "Err": err, "device-id": oo.deviceID})
		return err
	}
	omciRxCallbackPair := CallbackPair{
		CbKey:   tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send get-request-msg", log.Fields{"meClassIDName": classID, "Err": err, "device-id": oo.deviceID})
		return err
	}
	logger.Debugw(ctx, "send get-request-msg done", log.Fields{"meClassIDName": classID, "device-id": oo.deviceID})
	return nil
}

// SendCreateDot1PMapper creates Ieee8021PMapperServiceProfile ME instance
func (oo *OmciCC) SendCreateDot1PMapper(ctx context.Context, timeout int, highPrio bool,
	aInstID uint16, rxChan chan Message) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send .1pMapper-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{
		EntityID: aInstID,
		Attributes: me.AttributeValueMap{
			//workaround for unsuitable omci-lib default values, cmp VOL-3729
			me.Ieee8021PMapperServiceProfile_TpPointer:                          0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority0: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority1: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority2: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority3: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority4: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority5: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority6: 0xFFFF,
			me.Ieee8021PMapperServiceProfile_InterworkTpPointerForPBitPriority7: 0xFFFF,
		},
	}
	meInstance, omciErr := me.NewIeee8021PMapperServiceProfile(meParams)
	if omciErr.GetError() == nil {
		//we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode .1pMapper for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize .1pMapper create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send .1pMapper create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send .1pMapper-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate .1pMapper", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMBPConfigDataVar creates MacBridgePortConfigurationData ME instance
func (oo *OmciCC) SendCreateMBPConfigDataVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MBPCD-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMacBridgePortConfigurationData(params[0])
	if omciErr.GetError() == nil {
		//obviously we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MBPCD for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MBPCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MBPCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MBPCD-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MBPCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateGemNCTPVar creates GemPortNetworkCtp ME instance
func (oo *OmciCC) SendCreateGemNCTPVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GemNCTP-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewGemPortNetworkCtp(params[0])
	if omciErr.GetError() == nil {
		//obviously we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GemNCTP for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GemNCTP create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GemNCTP create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GemNCTP-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GemNCTP Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetGemNCTPVar sets GemPortNetworkCtp ME instance
func (oo *OmciCC) SendSetGemNCTPVar(ctx context.Context, timeout int, highPrio bool, rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GemNCTP-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewGemPortNetworkCtp(params[0])
	if omciErr.GetError() == nil {
		//obviously we have to set all 'untouched' parameters to default by some additional option parameter!!
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GemNCTP for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GemNCTP set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GemNCTP set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GemNCTP-Set-msg done", log.Fields{"device-id": oo.deviceID})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GemNCTP Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateGemIWTPVar creates GemInterworkingTerminationPoint ME instance
func (oo *OmciCC) SendCreateGemIWTPVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GemIwTp-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewGemInterworkingTerminationPoint(params[0])
	if omciErr.GetError() == nil {
		//all SetByCreate Parameters (assumed to be) set here, for optimisation no 'AddDefaults'
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GemIwTp for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GemIwTp create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GemIwTp create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GemIwTp-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GemIwTp Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetTcontVar sets TCont ME instance
func (oo *OmciCC) SendSetTcontVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TCont-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewTCont(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TCont for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TCont set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TCont set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TCont-set msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TCont Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetPrioQueueVar sets PriorityQueue ME instance
func (oo *OmciCC) SendSetPrioQueueVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send PrioQueue-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewPriorityQueue(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode PrioQueue for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize PrioQueue set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send PrioQueue set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send PrioQueue-set msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate PrioQueue Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetDot1PMapperVar sets Ieee8021PMapperServiceProfile ME instance
func (oo *OmciCC) SendSetDot1PMapperVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send 1PMapper-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewIeee8021PMapperServiceProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode 1PMapper for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize 1PMapper set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send 1PMapper set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send 1PMapper-set msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate 1PMapper Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateVtfdVar creates VlanTaggingFilterData ME instance
func (oo *OmciCC) SendCreateVtfdVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VTFD-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVlanTaggingFilterData(params[0])
	if omciErr.GetError() == nil {
		//all SetByCreate Parameters (assumed to be) set here, for optimisation no 'AddDefaults'
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VTFD for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VTFD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VTFD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VTFD-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VTFD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// nolint: unused
func (oo *OmciCC) sendSetVtfdVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VTFD-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVlanTaggingFilterData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VTFD for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VTFD set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VTFD set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VTFD-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VTFD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateEvtocdVar creates ExtendedVlanTaggingOperationConfigurationData ME instance
func (oo *OmciCC) SendCreateEvtocdVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send EVTOCD-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewExtendedVlanTaggingOperationConfigurationData(params[0])
	if omciErr.GetError() == nil {
		//EnhancedMode not yet supported, used with default options
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType,
			oframe.TransactionID(tid), oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode EVTOCD for create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize EVTOCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send EVTOCD create", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send EVTOCD-set msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate EVTOCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetEvtocdVar sets ExtendedVlanTaggingOperationConfigurationData ME instance
func (oo *OmciCC) SendSetEvtocdVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send EVTOCD-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewExtendedVlanTaggingOperationConfigurationData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode EVTOCD for set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize EVTOCD set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send EVTOCD set", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send EVTOCD-set msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate EVTOCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteEvtocd deletes ExtendedVlanTaggingOperationConfigurationData ME instance
func (oo *OmciCC) SendDeleteEvtocd(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send EVTOCD-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewExtendedVlanTaggingOperationConfigurationData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode EVTOCD for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize EVTOCD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send EVTOCD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send EVTOCD-delete msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate EVTOCD Instance", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteVtfd deletes VlanTaggingFilterData ME instance
func (oo *OmciCC) SendDeleteVtfd(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VTFD-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewVlanTaggingFilterData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VTFD for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VTFD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VTFD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VTFD-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VTFD Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateTDVar creates TrafficDescriptor ME instance
func (oo *OmciCC) SendCreateTDVar(ctx context.Context, timeout int, highPrio bool, rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TD-Create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})
	meInstance, omciErr := me.NewTrafficDescriptor(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TD for create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TD create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TD create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TD-Create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TD Instance", log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// nolint: unused
func (oo *OmciCC) sendSetTDVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TD-Set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewTrafficDescriptor(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TD for set", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TD set", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TD set", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TD-Set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TD Instance", log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()

}

// SendDeleteTD - TODO: add comment
func (oo *OmciCC) SendDeleteTD(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TD-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewTrafficDescriptor(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TD for delete", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TD delete", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TD delete", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TD-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TD Instance", log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()

}

// SendDeleteGemIWTP deletes GemInterworkingTerminationPoint ME instance
func (oo *OmciCC) SendDeleteGemIWTP(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GemIwTp-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewGemInterworkingTerminationPoint(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GemIwTp for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GemIwTp delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GemIwTp delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GemIwTp-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GemIwTp Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteGemNCTP deletes GemPortNetworkCtp ME instance
func (oo *OmciCC) SendDeleteGemNCTP(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send GemNCtp-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewGemPortNetworkCtp(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode GemNCtp for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize GemNCtp delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send GemNCtp delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send GemNCtp-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate GemNCtp Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteDot1PMapper deletes Ieee8021PMapperServiceProfile ME instance
func (oo *OmciCC) SendDeleteDot1PMapper(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send .1pMapper-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewIeee8021PMapperServiceProfile(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode .1pMapper for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize .1pMapper delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send .1pMapper delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send .1pMapper-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate .1pMapper Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteMBPConfigData deletes MacBridgePortConfigurationData ME instance
func (oo *OmciCC) SendDeleteMBPConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MBPCD-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewMacBridgePortConfigurationData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MBPCD for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MBPCD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MBPCD delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MBPCD-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MBPCD Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMulticastGemIWTPVar creates MulticastGemInterworkingTerminationPoint ME instance
func (oo *OmciCC) SendCreateMulticastGemIWTPVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MulticastGemIWTP-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMulticastGemInterworkingTerminationPoint(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MulticastGEMIWTP for create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MulticastGEMIWTP create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MulticastGEMIWTP create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MulticastGEMIWTP-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MulticastGEMIWTP Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetMulticastGemIWTPVar sets MulticastGemInterworkingTerminationPoint ME instance
func (oo *OmciCC) SendSetMulticastGemIWTPVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MulticastGemIWTP-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMulticastGemInterworkingTerminationPoint(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MulticastGEMIWTP for set", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MulticastGEMIWTP create", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MulticastGEMIWTP set", log.Fields{"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MulticastGEMIWTP-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MulticastGEMIWTP Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMulticastOperationProfileVar creates MulticastOperationsProfile ME instance
func (oo *OmciCC) SendCreateMulticastOperationProfileVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MulticastOperationProfile-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMulticastOperationsProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MulticastOperationProfile for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MulticastOperationProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MulticastOperationProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MulticastOperationProfile-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MulticastOperationProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetMulticastOperationProfileVar sets MulticastOperationsProfile ME instance
func (oo *OmciCC) SendSetMulticastOperationProfileVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MulticastOperationProfile-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMulticastOperationsProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MulticastOperationProfile for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MulticastOperationProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MulticastOperationProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MulticastOperationProfile-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MulticastOperationProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateMulticastSubConfigInfoVar creates MulticastSubscriberConfigInfo ME instance
func (oo *OmciCC) SendCreateMulticastSubConfigInfoVar(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send MulticastSubConfigInfo-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewMulticastSubscriberConfigInfo(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode MulticastSubConfigInfo for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize MulticastSubConfigInfo create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send MulticastSubConfigInfo create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send MulticastSubConfigInfo-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate MulticastSubConfigInfo Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateVoipVoiceCTP nolint: unused
func (oo *OmciCC) SendCreateVoipVoiceCTP(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipVoiceCTP-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipVoiceCtp(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipVoiceCTP for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipVoiceCTP create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipVoiceCTP create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipVoiceCTP-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipVoiceCTP Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetVoipVoiceCTP nolint: unused
func (oo *OmciCC) SendSetVoipVoiceCTP(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipVoiceCTP-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipVoiceCtp(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipVoiceCTP for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipVoiceCTP set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipVoiceCTP set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipVoiceCTP-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipVoiceCTP Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteVoipVoiceCTP nolint: unused
func (oo *OmciCC) SendDeleteVoipVoiceCTP(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipVoiceCTP-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewVoipVoiceCtp(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipVoiceCTP for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			//TODO!!: refactoring improvement requested, here as an example for [VOL-3457]:
			//  return (dual format) error code that can be used at caller for immediate error treatment
			//  (relevant to all used sendXX() methods and their error conditions)
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipVoiceCTP delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipVoiceCTP delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipVoiceCTP-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipVoiceCTP Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateVoipMediaProfile nolint: unused
func (oo *OmciCC) SendCreateVoipMediaProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipMediaProfile-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipMediaProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipMediaProfile for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipMediaProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipMediaProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipMediaProfile-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipMediaProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetVoipMediaProfile nolint: unused
func (oo *OmciCC) SendSetVoipMediaProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipMediaProfile-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipMediaProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipMediaProfile for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipMediaProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipMediaProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipMediaProfile-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipMediaProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteVoipMediaProfile nolint: unused
func (oo *OmciCC) SendDeleteVoipMediaProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipMediaProfile-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewVoipMediaProfile(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipMediaProfile for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipMediaProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipMediaProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipMediaProfile-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipMediaProfile Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateVoiceServiceProfile nolint: unused
func (oo *OmciCC) SendCreateVoiceServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoiceServiceProfile-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoiceServiceProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoiceServiceProfile for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoiceServiceProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoiceServiceProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoiceServiceProfile-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoiceServiceProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetVoiceServiceProfile nolint: unused
func (oo *OmciCC) SendSetVoiceServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoiceServiceProfile-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoiceServiceProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoiceServiceProfile for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoiceServiceProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoiceServiceProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoiceServiceProfile-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoiceServiceProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteVoiceServiceProfile nolint: unused
func (oo *OmciCC) SendDeleteVoiceServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoiceServiceProfile-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewVoiceServiceProfile(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoiceServiceProfile for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoiceServiceProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoiceServiceProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoiceServiceProfile-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoiceServiceProfile Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateSIPUserData nolint: unused
func (oo *OmciCC) SendCreateSIPUserData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPUserData-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewSipUserData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPUserData for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPUserData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPUserData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPUserData-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPUserData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetSIPUserData nolint: unused
func (oo *OmciCC) SendSetSIPUserData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPUserData-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewSipUserData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPUserData for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPUserData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPUserData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPUserData-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPUserData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteSIPUserData nolint: unused
func (oo *OmciCC) SendDeleteSIPUserData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPUserData-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewSipUserData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPUserData for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPUserData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPUserData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPUserData-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPUserData Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateVoipApplicationServiceProfile nolint: unused
func (oo *OmciCC) SendCreateVoipApplicationServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipApplicationServiceProfile-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipApplicationServiceProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipApplicationServiceProfile for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipApplicationServiceProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipApplicationServiceProfile create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipApplicationServiceProfile-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipApplicationServiceProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetVoipApplicationServiceProfile nolint: unused
func (oo *OmciCC) SendSetVoipApplicationServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send VoipApplicationServiceProfile-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewVoipApplicationServiceProfile(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode VoipApplicationServiceProfile for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize VoipApplicationServiceProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send VoipApplicationServiceProfile set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send VoipApplicationServiceProfile-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate VoipApplicationServiceProfile Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteVoipApplicationServiceProfile nolint: unused
func (oo *OmciCC) SendDeleteVoipApplicationServiceProfile(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPVoipApplicationServiceProfile-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewVoipApplicationServiceProfile(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPVoipApplicationServiceProfile for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPVoipApplicationServiceProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPVoipApplicationServiceProfile delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPVoipApplicationServiceProfile-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPVoipApplicationServiceProfile Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateSIPAgentConfigData nolint: unused
func (oo *OmciCC) SendCreateSIPAgentConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPAgentConfigData-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewSipAgentConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPAgentConfigData for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPAgentConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPAgentConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPAgentConfigData-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPAgentConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetSIPAgentConfigData nolint: unused
func (oo *OmciCC) SendSetSIPAgentConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPAgentConfigData-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewSipAgentConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPAgentConfigData for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPAgentConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPAgentConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPAgentConfigData-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPAgentConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteSIPAgentConfigData nolint: unused
func (oo *OmciCC) SendDeleteSIPAgentConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send SIPAgentConfigData-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewSipAgentConfigData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode SIPAgentConfigData for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize SIPAgentConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send SIPAgentConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send SIPAgentConfigData-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPAgentConfigData Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateTCPUDPConfigData nolint: unused
func (oo *OmciCC) SendCreateTCPUDPConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TCPUDPConfigData-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewTcpUdpConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TCPUDPConfigData for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TCPUDPConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TCPUDPConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TCPUDPConfigData-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TCPUDPConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetTCPUDPConfigData nolint: unused
func (oo *OmciCC) SendSetTCPUDPConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TCPUDPConfigData-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewTcpUdpConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TCPUDPConfigData for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TCPUDPConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TCPUDPConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TCPUDPConfigData-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate TCPUDPConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteTCPUDPConfigData nolint: unused
func (oo *OmciCC) SendDeleteTCPUDPConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send TCPUDPConfigData-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewTcpUdpConfigData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode TCPUDPConfigData for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize TCPUDPConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send TCPUDPConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send TCPUDPConfigData-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate SIPAgentConfigData Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateIPHostConfigData nolint: unused
func (oo *OmciCC) SendCreateIPHostConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send IPHostConfigData-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewIpHostConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode IPHostConfigData for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize IPHostConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send IPHostConfigData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send IPHostConfigData-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate IPHostConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetIPHostConfigData nolint: unused
func (oo *OmciCC) SendSetIPHostConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send IPHostConfigData-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewIpHostConfigData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode IPHostConfigData for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize IPHostConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send IPHostConfigData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send IPHostConfigData-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate IPHostConfigData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteIPHostConfigData nolint: unused
func (oo *OmciCC) SendDeleteIPHostConfigData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send IPHostConfigData-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewIpHostConfigData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode IPHostConfigData for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize IPHostConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send IPHostConfigData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send IPHostConfigData-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate IPHostConfigData Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateRTPProfileData nolint: unused
func (oo *OmciCC) SendCreateRTPProfileData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send RTPProfileData-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewRtpProfileData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode RTPProfileData for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize RTPProfileData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send RTPProfileData create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send RTPProfileData-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate RTPProfileData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetRTPProfileData nolint: unused
func (oo *OmciCC) SendSetRTPProfileData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send RTPProfileData-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewRtpProfileData(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode RTPProfileData for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize RTPProfileData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send RTPProfileData set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send RTPProfileData-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate RTPProfileData Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteRTPProfileData nolint: unused
func (oo *OmciCC) SendDeleteRTPProfileData(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send RTPProfileData-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewRtpProfileData(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode RTPProfileData for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize RTPProfileData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send RTPProfileData delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send RTPProfileData-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate RTPProfileData Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendCreateNetworkDialPlanTable nolint: unused
func (oo *OmciCC) SendCreateNetworkDialPlanTable(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send NetworkDialPlanTable-create-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewNetworkDialPlanTable(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode NetworkDialPlanTable for create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize NetworkDialPlanTable create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send NetworkDialPlanTable create", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send NetworkDialPlanTable-create-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate NetworkDialPlanTable Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSetNetworkDialPlanTable nolint: unused
func (oo *OmciCC) SendSetNetworkDialPlanTable(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, params ...me.ParamData) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send NetworkDialPlanTable-set-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(params[0].EntityID), 16)})

	meInstance, omciErr := me.NewNetworkDialPlanTable(params[0])
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid),
			oframe.AddDefaults(true))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode NetworkDialPlanTable for set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize NetworkDialPlanTable set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send NetworkDialPlanTable set", log.Fields{"Err": err,
				"device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send NetworkDialPlanTable-set-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate NetworkDialPlanTable Instance", log.Fields{"Err": omciErr.GetError(),
		"device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendDeleteNetworkDialPlanTable nolint: unused
func (oo *OmciCC) SendDeleteNetworkDialPlanTable(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aInstID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send NetworkDialPlanTable-Delete-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aInstID), 16)})

	meParams := me.ParamData{EntityID: aInstID}
	meInstance, omciErr := me.NewNetworkDialPlanTable(meParams)
	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.DeleteRequestType,
			oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "Cannot encode NetworkDialPlanTable for delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize NetworkDialPlanTable delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send NetworkDialPlanTable delete", log.Fields{
				"Err": err, "device-id": oo.deviceID})
			return nil, err
		}
		logger.Debug(ctx, "send NetworkDialPlanTable-Delete-msg done")
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate NetworkDialPlanTable Instance for delete", log.Fields{
		"Err": omciErr.GetError(), "device-id": oo.deviceID})
	return nil, omciErr.GetError()
}

// SendSyncTime sends SynchronizeTimeRequest
func (oo *OmciCC) SendSyncTime(ctx context.Context, timeout int, highPrio bool, rxChan chan Message) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send synchronize time request:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16)})

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.SynchronizeTimeRequestType,
		// DeviceIdentifier: omci.BaselineIdent,        // Optional, defaults to Baseline
		// Length:           0x28,                      // Optional, defaults to 40 octets
	}
	utcTime := time.Now().UTC()
	request := &omci.SynchronizeTimeRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass: me.OnuGClassID,
			// Default Instance ID is 0
		},
		Year:   uint16(utcTime.Year()),
		Month:  uint8(utcTime.Month()),
		Day:    uint8(utcTime.Day()),
		Hour:   uint8(utcTime.Hour()),
		Minute: uint8(utcTime.Minute()),
		Second: uint8(utcTime.Second()),
	}

	pkt, err := SerializeOmciLayer(ctx, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize synchronize time request", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send synchronize time request", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send synchronize time request done")
	return nil
}

// SendCreateOrDeleteEthernetPerformanceMonitoringHistoryME creates or deletes EthernetFramePerformanceMonitoringHistoryData ME instance
func (oo *OmciCC) SendCreateOrDeleteEthernetPerformanceMonitoringHistoryME(ctx context.Context, timeout int, highPrio bool,
	upstream bool, create bool, rxChan chan Message, entityID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send ethernet-performance-monitoring-history-me-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16), "create": create, "upstream": upstream})
	meParam := me.ParamData{EntityID: entityID}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	if upstream {
		meInstance, omciErr = me.NewEthernetFramePerformanceMonitoringHistoryDataUpstream(meParam)
	} else {
		meInstance, omciErr = me.NewEthernetFramePerformanceMonitoringHistoryDataDownstream(meParam)
	}
	if omciErr.GetError() == nil {
		var omciLayer *omci.OMCI
		var msgLayer gopacket.SerializableLayer
		var err error
		if create {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		} else {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		}
		if err != nil {
			logger.Errorw(ctx, "Cannot encode ethernet frame performance monitoring history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize ethernet frame performance monitoring history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ethernet frame performance monitoring history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send ethernet frame performance monitoring history data ME done",
			log.Fields{"device-id": oo.deviceID, "upstream": upstream, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate ethernet frame performance monitoring history data ME Instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "upstream": upstream, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// SendCreateOrDeleteEthernetUniHistoryME creates or deletes EthernetPerformanceMonitoringHistoryData ME instance
func (oo *OmciCC) SendCreateOrDeleteEthernetUniHistoryME(ctx context.Context, timeout int, highPrio bool,
	create bool, rxChan chan Message, entityID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send ethernet-uni-history-me-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16), "create": create})
	meParam := me.ParamData{EntityID: entityID}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	meInstance, omciErr = me.NewEthernetPerformanceMonitoringHistoryData(meParam)

	if omciErr.GetError() == nil {
		var omciLayer *omci.OMCI
		var msgLayer gopacket.SerializableLayer
		var err error
		if create {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		} else {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		}
		if err != nil {
			logger.Errorw(ctx, "Cannot encode ethernet uni history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize ethernet uni history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ethernet uni history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send ethernet uni history data ME done",
			log.Fields{"device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate ethernet uni history data ME Instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// SendCreateOrDeleteFecHistoryME creates or deletes FecPerformanceMonitoringHistoryData ME instance
func (oo *OmciCC) SendCreateOrDeleteFecHistoryME(ctx context.Context, timeout int, highPrio bool,
	create bool, rxChan chan Message, entityID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send fec-history-me-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16), "create": create})
	meParam := me.ParamData{EntityID: entityID}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	meInstance, omciErr = me.NewFecPerformanceMonitoringHistoryData(meParam)

	if omciErr.GetError() == nil {
		var omciLayer *omci.OMCI
		var msgLayer gopacket.SerializableLayer
		var err error
		if create {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		} else {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		}
		if err != nil {
			logger.Errorw(ctx, "Cannot encode fec history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize fec history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send fec history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send fec history data ME done",
			log.Fields{"device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate fec history data ME Instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// SendCreateOrDeleteGemPortHistoryME deletes GemPortNetworkCtpPerformanceMonitoringHistoryData ME instance
func (oo *OmciCC) SendCreateOrDeleteGemPortHistoryME(ctx context.Context, timeout int, highPrio bool,
	create bool, rxChan chan Message, entityID uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send gemport-history-me-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16), "create": create})
	meParam := me.ParamData{EntityID: entityID}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	meInstance, omciErr = me.NewGemPortNetworkCtpPerformanceMonitoringHistoryData(meParam)

	if omciErr.GetError() == nil {
		var omciLayer *omci.OMCI
		var msgLayer gopacket.SerializableLayer
		var err error
		if create {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		} else {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		}
		if err != nil {
			logger.Errorw(ctx, "Cannot encode gemport history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "Cannot serialize gemport history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send gemport history data ME",
				log.Fields{"Err": err, "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send gemport history data ME done",
			log.Fields{"device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "Cannot generate gemport history data ME Instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "create": create, "InstId": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// SendStartSoftwareDownload sends StartSoftwareDownloadRequest
func (oo *OmciCC) SendStartSoftwareDownload(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aImageMeID uint16, aDownloadWindowSize uint8, aFileLen uint32, aIsExtendedOmci bool) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send StartSwDlRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16)})

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.StartSoftwareDownloadRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.StartSoftwareDownloadRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
		WindowSize:           aDownloadWindowSize,
		ImageSize:            aFileLen,
		NumberOfCircuitPacks: 1,           //parallel download to multiple circuit packs not supported
		CircuitPacks:         []uint16{0}, //circuit pack indication don't care for NumberOfCircuitPacks=1, but needed by omci-lib
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize StartSwDlRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send StartSwDlRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send StartSwDlRequest done")
	return nil
}

// PrepareOnuSectionsOfWindow prepares a list of sections for each window
// Before invoking this function the oo.mutexTid  needs to be be locked so that
// GetOnuSwSecNextTid can be invoked without further locking
func (oo *OmciCC) PrepareOnuSectionsOfWindow(ctx context.Context,
	aImageMeID uint16, aAckRequest uint8, aDownloadSectionNo uint8, aSection []byte,
	omciMsgsPerWindow *ia.OmciMessages, aIsExtendedOmci bool) (OmciTransferStructure, error) {
	//onuswsections uses only low prioirity tids
	tid := oo.GetOnuSwSecNextTid()
	logger.Infow(ctx, "send DlSectionRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16), "omci-ack": aAckRequest, "sectionNo": aDownloadSectionNo, "sectionData": aSection})

	var omciTxReq OmciTransferStructure
	msgType := omci.DownloadSectionRequestType

	if aAckRequest > 0 {
		msgType = omci.DownloadSectionRequestWithResponseType

	}
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   msgType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	localSectionData := make([]byte, len(aSection))

	copy(localSectionData[:], aSection) // as long as DownloadSectionRequest defines array for SectionData we need to copy into the array
	request := &omci.DownloadSectionRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
		SectionNumber: aDownloadSectionNo,
		SectionData:   localSectionData,
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize DlSectionRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return omciTxReq, err
	}
	outgoingPacket := buffer.Bytes()

	omciMsgsPerWindow.Messages = append(omciMsgsPerWindow.Messages, outgoingPacket)

	if aAckRequest > 0 {
		// only the last section should have a timeout as an ack is required only for the last section of the window
		omciTxReq = OmciTransferStructure{
			withFramePrint: true,
			OnuSwWindow:    omciMsgsPerWindow,
		}
		return omciTxReq, nil
	}

	return omciTxReq, nil
}

// SendOnuSwSectionsWindowWithRxSupervision sends onu swd sections
func (oo *OmciCC) SendOnuSwSectionsWindowWithRxSupervision(ctx context.Context,
	aOmciTxRequest OmciTransferStructure, aTimeout int, rxChan chan Message) error {
	if aOmciTxRequest.OnuSwWindow == nil {
		logger.Errorw(ctx, "SendOnuSwSectionsWindowWithRxSupervision: omciTxRequest.OnuSwWindow is nil",
			log.Fields{"device-id": oo.deviceID})
		return fmt.Errorf("sendOnuSwSectionsWindowWithRxSupervision: omciTxRequest.OnuSwWindow is nil device-id: %v",
			oo.deviceID)
	}

	tid := oo.GetOnuSwSecLastTid()
	logger.Debugw(ctx, "SendOnuSwSectionsWindowWithRxSupervision tid for the last segment is ", log.Fields{"TID": tid})
	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}

	aOmciTxRequest.cbPair = omciRxCallbackPair
	logger.Debugw(ctx, "register-response-callback:", log.Fields{"for TansCorrId": aOmciTxRequest.cbPair.CbKey})
	oo.mutexRxSchedMap.Lock()
	// it could be checked, if the callback key is already registered - but simply overwrite may be acceptable ...
	oo.rxSchedulerMap[aOmciTxRequest.cbPair.CbKey] = aOmciTxRequest.cbPair.CbEntry
	oo.mutexRxSchedMap.Unlock()

	chSuccess := make(chan bool)
	aOmciTxRequest.chSuccess = chSuccess
	aOmciTxRequest.timeout = aTimeout
	aOmciTxRequest.retries = CDefaultRetries

	//tid := aOmciTxRequest.cbPair.CbKey
	oo.mutexMonReq.Lock()
	oo.monitoredRequests[tid] = aOmciTxRequest
	oo.mutexMonReq.Unlock()

	retries := aOmciTxRequest.retries
	retryCounter := 0
	if aTimeout == 0 {
		logger.Errorw(ctx, "no timeout present for last section of window", log.Fields{"device-id": oo.deviceID})
		return fmt.Errorf("no timeout present for last section of window device-id: %v", oo.deviceID)
	}
loop:
	for retryCounter <= retries {
		// the onu sw sections are enqueued only to the low priority queue
		oo.mutexLowPrioTxQueue.Lock()
		oo.lowPrioTxQueue.PushBack(aOmciTxRequest)
		oo.mutexLowPrioTxQueue.Unlock()

		//Register the call back again as we clean up the Map entry when we failed to send the message
		oo.mutexRxSchedMap.Lock()
		oo.rxSchedulerMap[aOmciTxRequest.cbPair.CbKey] = aOmciTxRequest.cbPair.CbEntry
		oo.mutexRxSchedMap.Unlock()

		go oo.sendQueuedRequests(ctx)

		select {
		case success := <-chSuccess:
			if success {
				logger.Debugw(ctx, "reqMon: response received in time",
					log.Fields{"tid": tid, "device-id": oo.deviceID})
			} else {
				logger.Debugw(ctx, "reqMon: wait for response aborted",
					log.Fields{"tid": tid, "device-id": oo.deviceID})
			}
			break loop
		case <-time.After(time.Duration(aTimeout) * time.Second):
			if retryCounter == retries {
				if oo.pBaseDeviceHandler.IsOltAvailable() {
					logger.Errorw(ctx, "reqMon: timeout waiting for response - no of max retries reached - send ONU device event!",
						log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
					oo.pOnuDeviceEntry.SendOnuDeviceEvent(ctx, OnuOmciCommunicationFailureSwUpgrade, OnuOmciCommunicationFailureSwUpgradeDesc)
				} else {
					logger.Errorw(ctx, "reqMon: timeout waiting for response - no of max retries reached - skip ONU device event: OLT unavailable!",
						log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
				}
				oo.incrementTxTimesouts()
				oo.mutexMonReq.Lock()
				delete(oo.monitoredRequests, tid)
				oo.mutexMonReq.Unlock()
				return fmt.Errorf("reqMon: timeout waiting for response - no of max retries reached device-id: %v", oo.deviceID)
			}
			logger.Infow(ctx, "reqMon: timeout waiting for response - retry",
				log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
			oo.incrementTxRetries()
		case _, ok := <-oo.pBaseDeviceHandler.GetDeviceDeleteCommChan(ctx):
			if !ok {
				logger.Warnw(ctx, "device deletion channel is closed", log.Fields{"device-id": oo.deviceID})
				oo.mutexMonReq.Lock()
				delete(oo.monitoredRequests, tid)
				oo.mutexMonReq.Unlock()
				return fmt.Errorf("device deletion channel is closed device-id: %v", oo.deviceID)
			}
			oo.mutexMonReq.Lock()
			delete(oo.monitoredRequests, tid)
			oo.mutexMonReq.Unlock()
			return fmt.Errorf("received response from device deletion comm channel while waiting for a OMCI response device-id: %v", oo.deviceID)
		}
		retryCounter++
	}
	oo.mutexMonReq.Lock()
	delete(oo.monitoredRequests, tid)
	oo.mutexMonReq.Unlock()
	return nil
}

func (oo *OmciCC) sendOnuSwSectionsOfWindow(ctx context.Context, omciTxRequest OmciTransferStructure) error {
	var lastSection []byte
	if omciTxRequest.OnuSwWindow != nil {
		lastSection = omciTxRequest.OnuSwWindow.Messages[len(omciTxRequest.OnuSwWindow.Messages)-1]
	} else {
		logger.Errorw(ctx, "invalid sw window received", log.Fields{"device-id": oo.deviceID})
		return fmt.Errorf("invalid sw window received")
	}
	if omciTxRequest.withFramePrint {
		logger.Debugw(ctx, "sw-section-omci-message-to-send:", log.Fields{
			"TxOmciMessage": hex.EncodeToString(lastSection),
			"device-id":     oo.deviceID,
			"toDeviceType":  oo.pBaseDeviceHandler.GetProxyAddressType(),
			"proxyDeviceID": oo.pBaseDeviceHandler.GetProxyAddressID(),
			"proxyAddress":  oo.pBaseDeviceHandler.GetProxyAddress()})
	}
	sendErr := oo.pBaseDeviceHandler.SendOnuSwSectionsOfWindow(ctx, oo.pBaseDeviceHandler.GetProxyAddress().AdapterEndpoint, omciTxRequest.OnuSwWindow)
	if sendErr != nil {
		logger.Errorw(ctx, "send onu sw sections omci request error", log.Fields{"device-id": oo.deviceID, "error": sendErr})
		return sendErr
	}
	numberOfNoArSections := len(omciTxRequest.OnuSwWindow.Messages) - 1 // last section of window is sent with AR expected
	if lastSection[cOmciDeviceIdentifierPos] == byte(omci.BaselineIdent) {
		oo.increaseBaseTxNoArFramesBy(ctx, uint32(numberOfNoArSections))
		oo.incrementBaseTxArFrames()
	} else {
		oo.increaseExtTxNoArFramesBy(ctx, uint32(numberOfNoArSections))
		oo.incrementExtTxArFrames()
	}
	return nil
}

// SendDownloadSection sends DownloadSectionRequestWithResponse
func (oo *OmciCC) SendDownloadSection(ctx context.Context, aTimeout int, highPrio bool,
	rxChan chan Message, aImageMeID uint16, aAckRequest uint8, aDownloadSectionNo uint8, aSection []byte, aPrint bool, aIsExtendedOmci bool) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send DlSectionRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16), "omci-ack": aAckRequest})

	//TODO!!!: don't know by now on how to generate the possibly needed AR (or enforce it to 0) with current omci-lib
	//    by now just try to send it as defined by omci-lib
	msgType := omci.DownloadSectionRequestType
	var timeout = 0 //default value for no response expected
	if aAckRequest > 0 {
		msgType = omci.DownloadSectionRequestWithResponseType
		timeout = aTimeout
	}
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   msgType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	localSectionData := make([]byte, len(aSection))

	copy(localSectionData[:], aSection) // as long as DownloadSectionRequest defines array for SectionData we need to copy into the array
	request := &omci.DownloadSectionRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
		SectionNumber: aDownloadSectionNo,
		SectionData:   localSectionData,
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize DlSectionRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	//for initial debug purpose overrule the requested print state for some frames
	printFrame := aPrint
	if aAckRequest > 0 || aDownloadSectionNo == 0 {
		printFrame = true
	}

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		// the callback is set even though no response might be required here, the tid (key) setting is needed here anyway
		//   (used to avoid retransmission of frames with the same TID)
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, printFrame /*aPrint*/},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send DlSectionRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send DlSectionRequest done")
	return nil
}

// SendEndSoftwareDownload sends EndSoftwareDownloadRequest
func (oo *OmciCC) SendEndSoftwareDownload(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aImageMeID uint16, aFileLen uint32, aImageCrc uint32, aIsExtendedOmci bool) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send EndSwDlRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16)})

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.EndSoftwareDownloadRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.EndSoftwareDownloadRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
		CRC32:             aImageCrc,
		ImageSize:         aFileLen,
		NumberOfInstances: 1,           //parallel download to multiple circuit packs not supported
		ImageInstances:    []uint16{0}, //don't care for NumberOfInstances=1, but probably needed by omci-lib as in startSwDlRequest
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize EndSwDlRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send EndSwDlRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send EndSwDlRequest done")
	return nil
}

// SendActivateSoftware sends ActivateSoftwareRequest
func (oo *OmciCC) SendActivateSoftware(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aImageMeID uint16, aIsExtendedOmci bool) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send ActivateSwRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16)})

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.ActivateSoftwareRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.ActivateSoftwareRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
		ActivateFlags: 0, //unconditionally reset as the only relevant option here (regardless of VOIP)
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize ActivateSwRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send ActivateSwRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send ActivateSwRequest done")
	return nil
}

// SendCommitSoftware sends CommitSoftwareRequest
func (oo *OmciCC) SendCommitSoftware(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, aImageMeID uint16, aIsExtendedOmci bool) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send CommitSwRequest:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(aImageMeID), 16)})

	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.CommitSoftwareRequestType,
		// DeviceIdentifier: omci.BaselineIdent,		// Optional, defaults to Baseline
		// Length:           0x28,						// Optional, defaults to 40 octets
	}
	if aIsExtendedOmci {
		omciLayer.DeviceIdentifier = omci.ExtendedIdent
	}
	request := &omci.CommitSoftwareRequest{
		MeBasePacket: omci.MeBasePacket{
			EntityClass:    me.SoftwareImageClassID,
			EntityInstance: aImageMeID, //inactive image
			Extended:       aIsExtendedOmci,
		},
	}

	var options gopacket.SerializeOptions
	options.FixLengths = true
	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize CommitSwRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send CommitSwRequest", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send CommitSwRequest done")
	return nil
}

// SendSelfTestReq sends TestRequest
func (oo *OmciCC) SendSelfTestReq(ctx context.Context, classID me.ClassID, instdID uint16, timeout int, highPrio bool, rxChan chan Message) error {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send self test request:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16),
		"InstId": strconv.FormatInt(int64(instdID), 16)})
	omciLayer := &omci.OMCI{
		TransactionID: tid,
		MessageType:   omci.TestRequestType,
		// DeviceIdentifier: omci.BaselineIdent,    // Optional, defaults to Baseline
		// Length:           0x28,                                      // Optional, defaults to 40 octets
	}

	var request *omci.OpticalLineSupervisionTestRequest
	switch classID {
	case me.AniGClassID:
		request = &omci.OpticalLineSupervisionTestRequest{
			MeBasePacket: omci.MeBasePacket{
				EntityClass:    classID,
				EntityInstance: instdID,
			},
			SelectTest:               uint8(7), // self test
			GeneralPurposeBuffer:     uint16(0),
			VendorSpecificParameters: uint16(0),
		}
	default:
		logger.Errorw(ctx, "unsupported class id for self test request", log.Fields{"device-id": oo.deviceID, "classID": classID})
		return fmt.Errorf("unsupported-class-id-for-self-test-request-%v", classID)
	}
	// Test serialization back to former string
	var options gopacket.SerializeOptions
	options.FixLengths = true

	buffer := gopacket.NewSerializeBuffer()
	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
	if err != nil {
		logger.Errorw(ctx, "Cannot serialize self test request", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	outgoingPacket := buffer.Bytes()

	omciRxCallbackPair := CallbackPair{CbKey: tid,
		CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
	}
	err = oo.Send(ctx, outgoingPacket, timeout, 0, highPrio, omciRxCallbackPair)
	if err != nil {
		logger.Errorw(ctx, "Cannot send self test request", log.Fields{"Err": err,
			"device-id": oo.deviceID})
		return err
	}
	logger.Debug(ctx, "send self test request done")
	return nil
}

// nolint: gocyclo
func (oo *OmciCC) isSuccessfulResponseWithMibDataSync(ctx context.Context, omciMsg *omci.OMCI, packet *gopacket.Packet) (bool, error) {

	nextLayer, err := omci.MsgTypeToNextLayer(omciMsg.MessageType, false)
	if err != nil {
		logger.Errorw(ctx, "omci-message: could not map msgType to nextLayer", log.Fields{"device-id": oo.deviceID})
		return false, fmt.Errorf("could not map msgType to nextLayer - %s", oo.deviceID)
	}
	msgLayer := (*packet).Layer(nextLayer)
	if msgLayer != nil {
		// Note: Due to relaxed decoding, you may now still have a decoding error attached to the layers
		if failure := (*packet).ErrorLayer(); failure != nil {
			switch nextLayer {
			case omci.LayerTypeMibUploadNextResponse:
				// In the case of MibUploadNextResponse, we let the packet pass so that later processing
				// can examine for UnkonwnMEs and UnknownAttributes
				logger.Debug(ctx, "omci-message: MibUploadNextResponse packet with ErrorLayer - let it pass",
					log.Fields{"device-id": oo.deviceID, "error": failure.Error()})
				return false, nil
			case omci.LayerTypeGetResponse:
				if resp := msgLayer.(*omci.GetResponse); resp != nil {
					if resp.NextLayerType() == omci.LayerTypeUnknownAttributes {
						unknownAttrLayer := (*packet).Layer(omci.LayerTypeUnknownAttributes)
						if unknownAttrLayer != nil {
							logger.Errorw(ctx, "omci-message: GetResponse packet contains unknownAttrLayer - skip it!",
								log.Fields{"device-id": oo.deviceID, "error": failure.Error(), "unknownAttrLayer": unknownAttrLayer})
							return false, fmt.Errorf("packet contains unknownAttrLayer - %s", oo.deviceID)
						}
					}
				}
			}
			// Try to decode any further error information
			if decodeFailure, ok := failure.(*gopacket.DecodeFailure); ok && decodeFailure != nil {
				logger.Errorw(ctx, "omci-message: packet contains ErrorLayer with further info - skip it!",
					log.Fields{"device-id": oo.deviceID, "error": failure.Error(), "decodeFailure": decodeFailure.String()})
				return false, fmt.Errorf("packet contains ErrorLayer with further info - %s", oo.deviceID)
			}
			logger.Errorw(ctx, "omci-message: packet contains ErrorLayer - skip it!",
				log.Fields{"device-id": oo.deviceID, "error": failure.Error()})
			return false, fmt.Errorf("packet contains ErrorLayer - %s", oo.deviceID)
		}
	} else if failure := (*packet).ErrorLayer(); failure != nil {
		// message layer could not be decoded, but at least check if additional failure information is available
		if decodeFailure, ok := failure.(*gopacket.DecodeFailure); ok && decodeFailure != nil {
			errMsg := decodeFailure.String()
			if nextLayer == omci.LayerTypeMibUploadNextResponse {
				if strings.Contains(strings.ToLower(errMsg), "table decode") {
					// In the case of MibUploadNextResponse with non-standard table attributes, we let the packet pass
					// so that later processing can deal with it
					logger.Infow(ctx, "omci-message: MibUploadNextResponse packet with table attributes - let it pass",
						log.Fields{"device-id": oo.deviceID, "error": failure.Error()})
					return false, nil
				}
			}
			logger.Errorw(ctx, "omci-message: could not decode msgLayer of packet, further info available - skip it!",
				log.Fields{"device-id": oo.deviceID, "error": failure.Error(), "decodeFailure": errMsg})
			return false, fmt.Errorf("could not decode msgLayer of packet, further info available - %s", oo.deviceID)
		}
		logger.Errorw(ctx, "omci-message: could not decode msgLayer of packet, ErrorLayer available",
			log.Fields{"device-id": oo.deviceID, "error": failure.Error()})
		return false, fmt.Errorf("could not decode msgLayer of packet, ErrorLayer available - %s", oo.deviceID)
	} else {
		logger.Errorw(ctx, "omci-message: could not decode msgLayer of packet", log.Fields{"device-id": oo.deviceID})
		return false, fmt.Errorf("could not decode msgLayer of packet - %s", oo.deviceID)
	}

	for _, v := range responsesWithMibDataSync {
		if v == omciMsg.MessageType {
			switch nextLayer {
			case omci.LayerTypeCreateResponse:
				if resp := msgLayer.(*omci.CreateResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeDeleteResponse:
				if resp := msgLayer.(*omci.DeleteResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeSetResponse:
				if resp := msgLayer.(*omci.SetResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeStartSoftwareDownloadResponse:
				if resp := msgLayer.(*omci.StartSoftwareDownloadResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeEndSoftwareDownloadResponse:
				if resp := msgLayer.(*omci.EndSoftwareDownloadResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeActivateSoftwareResponse:
				if resp := msgLayer.(*omci.ActivateSoftwareResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			case omci.LayerTypeCommitSoftwareResponse:
				if resp := msgLayer.(*omci.CommitSoftwareResponse); resp != nil {
					if resp.Result == me.Success {
						return true, nil
					}
				}
			}
		}
	}
	return false, nil
}

func (oo *OmciCC) processRequestMonitoring(ctx context.Context, aOmciTxRequest OmciTransferStructure) {
	timeout := aOmciTxRequest.timeout
	if timeout == 0 {
		//timeout 0 indicates that no response is expected - fire and forget
		// enqueue
		if aOmciTxRequest.highPrio {
			oo.mutexHighPrioTxQueue.Lock()
			oo.highPrioTxQueue.PushBack(aOmciTxRequest)
			oo.mutexHighPrioTxQueue.Unlock()
		} else {
			oo.mutexLowPrioTxQueue.Lock()
			oo.lowPrioTxQueue.PushBack(aOmciTxRequest)
			oo.mutexLowPrioTxQueue.Unlock()
		}
		go oo.sendQueuedRequests(ctx)
	} else {
		//the supervised sending with waiting on the response (based on TID) is called in background
		//  to avoid blocking of the sender for the complete OMCI handshake procedure
		//  to stay consistent with the processing tested so far, sending of next messages of the same control procedure
		//  is ensured by the according control instances (FSM's etc.) (by waiting for the respective responses there)
		go oo.sendWithRxSupervision(ctx, aOmciTxRequest, timeout)
	}
}

func (oo *OmciCC) sendWithRxSupervision(ctx context.Context, aOmciTxRequest OmciTransferStructure, aTimeout int) {
	chSuccess := make(chan bool)
	aOmciTxRequest.chSuccess = chSuccess
	tid := aOmciTxRequest.cbPair.CbKey
	oo.mutexMonReq.Lock()
	oo.monitoredRequests[tid] = aOmciTxRequest
	oo.mutexMonReq.Unlock()

	retries := aOmciTxRequest.retries
	retryCounter := 0
loop:
	for retryCounter <= retries {
		// enqueue
		if aOmciTxRequest.highPrio {
			oo.mutexHighPrioTxQueue.Lock()
			oo.highPrioTxQueue.PushBack(aOmciTxRequest)
			oo.mutexHighPrioTxQueue.Unlock()
		} else {
			oo.mutexLowPrioTxQueue.Lock()
			oo.lowPrioTxQueue.PushBack(aOmciTxRequest)
			oo.mutexLowPrioTxQueue.Unlock()
		}

		//Register the call back again as we clean up the Map entry when we failed to send the message .
		oo.mutexRxSchedMap.Lock()
		oo.rxSchedulerMap[aOmciTxRequest.cbPair.CbKey] = aOmciTxRequest.cbPair.CbEntry
		oo.mutexRxSchedMap.Unlock()

		go oo.sendQueuedRequests(ctx)

		select {
		case success := <-chSuccess:
			if success {
				logger.Debugw(ctx, "reqMon: response received in time",
					log.Fields{"tid": tid, "device-id": oo.deviceID})
			} else {
				logger.Debugw(ctx, "reqMon: wait for response aborted",
					log.Fields{"tid": tid, "device-id": oo.deviceID})
			}
			break loop
		case <-time.After(time.Duration(aTimeout) * time.Second):
			if retryCounter == retries {
				if oo.pBaseDeviceHandler.IsOltAvailable() {
					logger.Errorw(ctx, "reqMon: timeout waiting for response - no of max retries reached - send ONU device event!",
						log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
					oo.pOnuDeviceEntry.SendOnuDeviceEvent(ctx, OnuOmciCommunicationFailureConfig, OnuOmciCommunicationFailureConfigDesc)
				} else {
					logger.Errorw(ctx, "reqMon: timeout waiting for response - no of max retries reached - skip ONU device event: OLT unavailable!",
						log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
				}
				oo.incrementTxTimesouts()
				break loop
			} else {
				logger.Infow(ctx, "reqMon: timeout waiting for response - retry",
					log.Fields{"tid": tid, "retries": retryCounter, "device-id": oo.deviceID})
				oo.incrementTxRetries()
			}
		case _, ok := <-oo.pBaseDeviceHandler.GetDeviceDeleteCommChan(ctx):
			if !ok {
				logger.Warnw(ctx, "device deletion channel is closed at sendWithRxSupervision", log.Fields{"device-id": oo.deviceID})
				break loop
			}
		}
		retryCounter++
	}
	oo.mutexMonReq.Lock()
	delete(oo.monitoredRequests, tid)
	oo.mutexMonReq.Unlock()
}

// CancelRequestMonitoring terminates monitoring of outstanding omci requests
func (oo *OmciCC) CancelRequestMonitoring(ctx context.Context) {
	logger.Debugw(ctx, "CancelRequestMonitoring entered", log.Fields{"device-id": oo.deviceID})
	oo.mutexMonReq.RLock()
	for k := range oo.monitoredRequests {
		//implement non-blocking channel send to avoid blocking on mutexMonReq later
		select {
		case oo.monitoredRequests[k].chSuccess <- false:
			logger.Debugw(ctx, "send cancellation on omciRespChannel",
				log.Fields{"index": k, "device-id": oo.deviceID})
		default:
			logger.Debugw(ctx, "cancellation could not be send on omciRespChannel (no receiver)",
				log.Fields{"index": k, "device-id": oo.deviceID})
		}
	}
	oo.mutexMonReq.RUnlock()
}

// GetMaxOmciTimeoutWithRetries provides a timeout value greater than the maximum
// time consumed for retry processing of a particular OMCI-request
func (oo *OmciCC) GetMaxOmciTimeoutWithRetries() time.Duration {
	return time.Duration((CDefaultRetries+1)*oo.pBaseDeviceHandler.GetOmciTimeout() + 1)
}

// SendCreateOrDeleteEthernetFrameExtendedPMME deletes EthernetFrameExtendedPm ME instance
func (oo *OmciCC) SendCreateOrDeleteEthernetFrameExtendedPMME(ctx context.Context, timeout int, highPrio bool,
	upstream bool, create bool, rxChan chan Message, entityID uint16, classID me.ClassID, controlBlock []uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Info(ctx, "send-ethernet-frame-extended-pm-me-msg:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16), "create": create, "upstream": upstream})

	meParam := me.ParamData{EntityID: entityID,
		Attributes: me.AttributeValueMap{me.EthernetFrameExtendedPm_ControlBlock: controlBlock},
	}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	if classID == me.EthernetFrameExtendedPmClassID {
		meInstance, omciErr = me.NewEthernetFrameExtendedPm(meParam)
	} else {
		meInstance, omciErr = me.NewEthernetFrameExtendedPm64Bit(meParam)
	}

	if omciErr.GetError() == nil {
		var omciLayer *omci.OMCI
		var msgLayer gopacket.SerializableLayer
		var err error
		if create {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.CreateRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		} else {
			omciLayer, msgLayer, err = oframe.EncodeFrame(meInstance, omci.DeleteRequestType, oframe.TransactionID(tid),
				oframe.AddDefaults(true))
		}
		if err != nil {
			logger.Errorw(ctx, "cannot-encode-ethernet-frame-extended-pm-me",
				log.Fields{"err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "cannot-serialize-ethernet-frame-extended-pm-me",
				log.Fields{"err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}

		omciRxCallbackPair := CallbackPair{CbKey: tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ethernet-frame-extended-pm-me",
				log.Fields{"Err": err, "device-id": oo.deviceID, "upstream": upstream, "create": create, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send-ethernet-frame-extended-pm-me-done",
			log.Fields{"device-id": oo.deviceID, "upstream": upstream, "create": create, "inst-id": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "cannot-generate-ethernet-frame-extended-pm-me-instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "upstream": upstream, "create": create, "inst-id": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// RLockMutexMonReq lock read access to monitoredRequests
func (oo *OmciCC) RLockMutexMonReq() {
	oo.mutexMonReq.RLock()
}

// RUnlockMutexMonReq unlock read access to monitoredRequests
func (oo *OmciCC) RUnlockMutexMonReq() {
	oo.mutexMonReq.RUnlock()
}

// GetMonitoredRequest get OmciTransferStructure for an omciTransID
func (oo *OmciCC) GetMonitoredRequest(omciTransID uint16) (value OmciTransferStructure, exist bool) {
	value, exist = oo.monitoredRequests[omciTransID]
	return value, exist
}

// SetChMonitoredRequest sets chSuccess to indicate whether response was received or not
func (oo *OmciCC) SetChMonitoredRequest(omciTransID uint16, chVal bool) {
	oo.monitoredRequests[omciTransID].chSuccess <- chVal
}

// SendSetEthernetFrameExtendedPMME sends the set request for ethernet frame extended type me
func (oo *OmciCC) SendSetEthernetFrameExtendedPMME(ctx context.Context, timeout int, highPrio bool,
	rxChan chan Message, entityID uint16, classID me.ClassID, controlBlock []uint16) (*me.ManagedEntity, error) {
	tid := oo.GetNextTid(highPrio)
	logger.Debugw(ctx, "send-set-ethernet-frame-extended-pm-me-control-block:", log.Fields{"device-id": oo.deviceID,
		"SequNo": strconv.FormatInt(int64(tid), 16), "InstId": strconv.FormatInt(int64(entityID), 16)})

	meParams := me.ParamData{EntityID: entityID,
		Attributes: me.AttributeValueMap{me.EthernetFrameExtendedPm_ControlBlock: controlBlock},
	}
	var meInstance *me.ManagedEntity
	var omciErr me.OmciErrors
	if classID == me.EthernetFrameExtendedPmClassID {
		meInstance, omciErr = me.NewEthernetFrameExtendedPm(meParams)
	} else {
		meInstance, omciErr = me.NewEthernetFrameExtendedPm64Bit(meParams)
	}

	if omciErr.GetError() == nil {
		omciLayer, msgLayer, err := oframe.EncodeFrame(meInstance, omci.SetRequestType, oframe.TransactionID(tid))
		if err != nil {
			logger.Errorw(ctx, "cannot-encode-ethernet-frame-extended-pm-me",
				log.Fields{"err": err, "device-id": oo.deviceID, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		pkt, err := SerializeOmciLayer(ctx, omciLayer, msgLayer)
		if err != nil {
			logger.Errorw(ctx, "cannot-serialize-ethernet-frame-extended-pm-me-set-msg",
				log.Fields{"err": err, "device-id": oo.deviceID, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		omciRxCallbackPair := CallbackPair{
			CbKey:   tid,
			CbEntry: CallbackPairEntry{rxChan, oo.receiveOmciResponse, true},
		}
		err = oo.Send(ctx, pkt, timeout, CDefaultRetries, highPrio, omciRxCallbackPair)
		if err != nil {
			logger.Errorw(ctx, "Cannot send ethernet-frame-extended-pm-me",
				log.Fields{"Err": err, "device-id": oo.deviceID, "inst-id": strconv.FormatInt(int64(entityID), 16)})
			return nil, err
		}
		logger.Debugw(ctx, "send-ethernet-frame-extended-pm-me-set-msg-done",
			log.Fields{"device-id": oo.deviceID, "inst-id": strconv.FormatInt(int64(entityID), 16)})
		return meInstance, nil
	}
	logger.Errorw(ctx, "cannot-generate-ethernet-frame-extended-pm-me-instance",
		log.Fields{"Err": omciErr.GetError(), "device-id": oo.deviceID, "inst-id": strconv.FormatInt(int64(entityID), 16)})
	return nil, omciErr.GetError()
}

// PrepareForGarbageCollection - remove references to prepare for garbage collection
func (oo *OmciCC) PrepareForGarbageCollection(ctx context.Context, aDeviceID string) {
	logger.Debugw(ctx, "prepare for garbage collection", log.Fields{"device-id": aDeviceID})
	oo.pBaseDeviceHandler = nil
	oo.pOnuDeviceEntry = nil
	oo.pOnuAlarmManager = nil
}

// GetOmciCounters - TODO: add comment
func (oo *OmciCC) GetOmciCounters() *extension.SingleGetValueResponse {
	oo.mutexCounters.RLock()
	defer oo.mutexCounters.RUnlock()
	resp := extension.SingleGetValueResponse{
		Response: &extension.GetValueResponse{
			Status: extension.GetValueResponse_OK,
			Response: &extension.GetValueResponse_OnuOmciStats{
				OnuOmciStats: &extension.GetOnuOmciTxRxStatsResponse{},
			},
		},
	}
	resp.Response.GetOnuOmciStats().BaseTxArFrames = oo.countersBase.txArFrames
	resp.Response.GetOnuOmciStats().BaseTxNoArFrames = oo.countersBase.txNoArFrames
	resp.Response.GetOnuOmciStats().BaseRxAkFrames = oo.countersBase.rxAkFrames
	resp.Response.GetOnuOmciStats().BaseRxNoAkFrames = oo.countersBase.rxNoAkFrames
	resp.Response.GetOnuOmciStats().ExtTxArFrames = oo.countersExt.txArFrames
	resp.Response.GetOnuOmciStats().ExtTxNoArFrames = oo.countersExt.txNoArFrames
	resp.Response.GetOnuOmciStats().ExtRxAkFrames = oo.countersExt.rxAkFrames
	resp.Response.GetOnuOmciStats().ExtRxNoAkFrames = oo.countersExt.rxNoAkFrames
	resp.Response.GetOnuOmciStats().TxOmciCounterRetries = oo.txRetries
	resp.Response.GetOnuOmciStats().TxOmciCounterTimeouts = oo.txTimeouts
	return &resp
}

// For more speed, separate functions for each counter

func (oo *OmciCC) incrementBaseTxArFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersBase.txArFrames++
}

func (oo *OmciCC) incrementExtTxArFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersExt.txArFrames++
}

func (oo *OmciCC) incrementBaseRxAkFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersBase.rxAkFrames++
}

func (oo *OmciCC) incrementExtRxAkFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersExt.rxAkFrames++
}

//nolint:unparam
func (oo *OmciCC) increaseBaseTxNoArFramesBy(ctx context.Context, value uint32) {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersBase.txNoArFrames += value
}

//nolint:unparam
func (oo *OmciCC) increaseExtTxNoArFramesBy(ctx context.Context, value uint32) {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersExt.txNoArFrames += value
}

func (oo *OmciCC) incrementBaseRxNoAkFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersBase.rxNoAkFrames++
}

func (oo *OmciCC) incrementExtRxNoAkFrames() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.countersExt.rxNoAkFrames++
}

func (oo *OmciCC) incrementTxRetries() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.txRetries++
}

func (oo *OmciCC) incrementTxTimesouts() {
	oo.mutexCounters.Lock()
	defer oo.mutexCounters.Unlock()
	oo.txTimeouts++
}

// NotifyAboutOnuConfigFailure - trigger ONU DeviceEvent to notify about ONU config failure
func (oo *OmciCC) NotifyAboutOnuConfigFailure(ctx context.Context, errID string, meClassID me.ClassID, meEntityID uint16,
	meName string, meResult me.Results) {
	var description string
	if !oo.confFailMeAlreadyHandled(meClassID) {
		switch errID {
		case OnuConfigFailureResponseErr:
			description = OnuConfigFailureResponseErrDesc + meResult.String() +
				", OMCI ME: " + meName + " / instance: " + fmt.Sprintf("%d", meEntityID) + " (only first instance reported)"
		case OnuConfigFailureTimeout:
			description = OnuConfigFailureTimeoutDesc + meName + " / instance: " + fmt.Sprintf("%d", meEntityID) +
				" (only first instance reported)"
		default:
			logger.Warnw(ctx, "method called with undefined errID", log.Fields{"errID": errID, "device-id": oo.deviceID})
			return
		}
		oo.pOnuDeviceEntry.SendOnuDeviceEvent(ctx, errID, description)
		oo.appendConfFailMe(meClassID)
	}
}

func (oo *OmciCC) confFailMeAlreadyHandled(meClassID me.ClassID) bool {
	oo.mutexConfFailMEs.RLock()
	defer oo.mutexConfFailMEs.RUnlock()
	for _, v := range oo.confFailMEs {
		if v == meClassID {
			return true
		}
	}
	return false
}

func (oo *OmciCC) appendConfFailMe(meClassID me.ClassID) {
	oo.mutexConfFailMEs.Lock()
	defer oo.mutexConfFailMEs.Unlock()
	oo.confFailMEs = append(oo.confFailMEs, meClassID)
}

// ResetConfFailMEs - reset list of stored config failure MEs
func (oo *OmciCC) ResetConfFailMEs() {
	oo.mutexConfFailMEs.Lock()
	defer oo.mutexConfFailMEs.Unlock()
	oo.confFailMEs = nil
}