Handling E1/T1 Alarms
Avaya X330WAN User’s Guide 81
In addition to the alarms, X330W-2DS1 provides error messages when it can not
establish a connection with the host P330 switch. In this case, verify that the
appropriate software versions are installed in the host P330 switch.
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 off and the ALM LED lights.
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 and the ACT LED is
off.
Corrective Actions:
Ensure that the line settings are compatible 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 T1 lines, 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.
For detailed information on CLI commands, see Chapter 6: X330WAN CLI
Commands.
Note: After clearing the condition causing the LOF alarm, the module continues to
indicate an LOF condition for approximately 10 seconds.