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Chapter 5 Handling E1/T1 Alarms
34 Avaya X330W-2DS1 User’s Guide
Alarm Conditions
The following section discusses the different types of alarms, how each alarm type
is indicated, and possible corrective actions to end the alarm.
LOS
Definition: Loss of Signal. This alarm is the result of a loss of the clock
synchronization signal. The alarm severity is Major.
Indication: The alarm is indicated when the SIG LED is not lit and the ALM LED is
lit.
Corrective Actions:
• 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
Definition: Loss of Frame. This alarm is the result of a loss of the frame
synchronization signal. The alarm severity is Major.
Indication: The alarm is indicated when the ALM LED lights.
Corrective Actions:
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
cablelength long 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
Table 5.1 Alarms
Alarm (E1/T1) Alarm Type Originating Alarm