TN Alarms and how to clear alarms

1- LOS (Critical)

 

Loss of Signal (LOS)
LOS is detected on the incoming traffic, probably due to traffic failure in transmitting direction.
Specific Problem

Specific Problem    : LOS
Source                     : E1
Alarm Type             :Communication Alarm
Severity                   :Critical
Probable Cause        :Loss Of Signal

 Corrective Actions

Check cables and equipment in the traffic path.

 Alarm Clearance
The alarm is cleared when traffic is detected in the incoming signal. 

2- AIS (Minor)

Alarm Indication Signal (AIS)
This alarm due to cable disconnected from RBS (Radio Base station) side or E1 disconnected from Route (before reach to TN at site)
An AIS is detected on the incoming traffic.

Specific Problem    : AIS
Source                     : E1
Alarm Type             :Communication Alarm
Severity                   :Minor
Probable Cause        :Alarm Indication Signal

3- HCC (Major)

Hop Communication Channel (HCC)
Communication is lost on the HCC, between the MMU and the far-end MMU.
When there is problem to connect with far end

Specific Problem    : HCC
Source                     : All MMUs
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Unavailable

Consequences
It is not possible to access the Far End.

 Alarm Clearance
The alarm is cleared when access to the Far End is recovered. 

4- RCC (Major)

Radio Communication Channel (RCC)
Communication is lost on the RCC, between the MMU and the RAU.

The RAU is disconnected from the MMU and therefore out of service.

Specific Problem    : RCC
Source                     : All MMUs
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Unavailable

5- TIM (Major)

Trace Identifier Mismatch (TIM)
TIM at the Radio side. (Check Radio ID)

Specific Problem    : TIM Radio Side
Source                     : RADIO RS
Alarm Type             :Communication Alarm
Severity                   :Major
Probable Cause        :Path Trace Mismatch