Avaya X330W2-DS1 Manuale Utente

Chapter 5

Handling E1/T1 Alarms

34

Avaya X330W-2DS1 User’s Guide

The following section discusses the different types of alarms, how each alarm type 
is indicated, and possible corrective actions to end the alarm.

LOS

Loss of Signal. This alarm is the result of a loss of the clock 

synchronization signal. The alarm severity is Major.

The alarm is indicated when the SIG LED is not lit and the ALM LED is 

lit.

•

Check that the E1/T1 cable is properly connected to the E1/T1 ports at both 
ends of the connection.

•

Check the integrity of the cable and pinouts.

•

Ensure that the receiving and transmitting pairs are not reversed.

•

If regenerators are used, check the integrity of the regenerators.

LOF/Red

Loss of Frame. This alarm is the result of a loss of the frame 

synchronization signal. The alarm severity is Major.

The alarm is indicated when the ALM LED lights.

Ensure that the line settings are compatable on both sides of the line. For example:
•

Ensure that both sides of the connection are configured to use the same line 
code and framing configuration. Use the show controllers command to 
view the current line code. Use the framing command to configure the framing 
mode and the line code command to configure the line code.

•

For T1lines, ensure that the line is configured for the cable length in use. Use the 
show controllers

 command to view the current configuration. Use the 

 and cablelength short commands to change the 

cable length configuration.

Low Ber/Minor

Local Alarm Indicator

N/A

RAI/Yellow

Remote Alarm Request

LOS, LOF, BER, AIS

AIS/Blue

Remote Alarm Request

Maintenance request

Alarm (E1/T1)

Alarm Type

Originating Alarm