diff --git a/internal/common/alarms.go b/internal/common/alarms.go
new file mode 100644
index 0000000..5102372
--- /dev/null
+++ b/internal/common/alarms.go
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+
+ * 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
+
+import (
+	"github.com/opencord/bbsim/api/bbsim"
+)
+
+var ONUAlarms = make(map[string]bbsim.AlarmType_Types)
+
+func init() {
+	for id, name := range bbsim.AlarmType_Types_name {
+		if id := bbsim.AlarmType_Types(id); id != bbsim.AlarmType_LOS {
+			ONUAlarms[name] = id
+		}
+	}
+}
+
+const OltNniLos = "OLT_NNI_LOS"
+const OltPonLos = "OLG_PON_LOS"
+
+var OLTAlarms = map[string]bbsim.AlarmType_Types{
+	OltNniLos: bbsim.AlarmType_LOS,
+	OltPonLos: bbsim.AlarmType_LOS,
+}