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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
command to
view the current line code. Use the
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
command to view the current configuration. Use the
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
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