Demand test descriptions and error codes - Avaya Support

Communication Manager Maintenance Object Repair Procedures
b. Error Type 18: the ATM circuit pack has been busied out either with the command
busyout atm sig-grp or busyout board location.
1. Release the ATM signaling group (release atm sig-grp) or the circuit pack
(release board location).
c. Error Type 257: the primary signaling chel connection has been lost for more than 90
seconds.
● The associated B-Chels are placed in the ISDN Maintenance/Far-End state.
● The B-Chels are not usable for outgoing calls, although incoming calls can be
accepted.
● The switch automatically attempts to recover the signaling link.
1. Check the results of the Primary Signaling Link Hardware Check (#636) in the test
sequence.
● When the link does recover, the B-Chels are negotiated back to the In-Service state
and their alarms are retired.
2. When this error occurs, the state of the Signaling Group is changed to out-of-service
(verify using the status sig-group command).
d. Error Type 769: signaling link hardware error.
Service-affecting failures of the hardware which is used to transport the D-Chel are reported
to the ATM CES Signaling Group MO. Maintenance logs this error, places the D-Chel into
the OOS state, and raises a board-level alarm. The D-Chel is returned to service, and the
alarm is retired once the hardware failure condition clears.
e. Error Type 1281: Degraded PVC alarms indicate that a particular Permanent Virtual Circuit,
or signaling group, has encountered sufficient errors to exceed firmware thresholds.
Operations can continue but at a lower level of reliability or performance. Firmware filters
these alarms so that only one is reported active at a given time. The following inline error is
considered a Degraded PVC alarm:
● Excessive AAL – The AAL layer is experiencing an excessive number of errors in
trying to reconstruct Service Data Units (SDUs). Possible causes:
- Problem with the ATM switch
- Noisy communication paths on opposite side of ATM switch
- Unhealthy sending node
- Congestion at the ATM switch
f. Error Type 1793: Layer 2 Query test for the primary signaling chel failed.
● Excessive AAL – The AAL layer is experiencing an excessive number of errors in
trying to reconstruct Service Data Unit (SDUs). Possible causes:
- Problem with the ATM switch
- Noisy communication paths on opposite side of ATM switch
- Unhealthy sending node
- Congestion at the ATM switch
172 Maintenance Alarms for Communication Manager, Media Gateways and Servers