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Communication Manager Maintenance-Object Repair Procedures
600 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
c. Error Type 18: the ATM circuit pack has been busied out (either 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).
d. Error Type 257: the primary signaling channel connection has been lost for more than 90
seconds.
● The associated B channels are placed in the ISDN Maintenance/Far-End state.
● The B channels are not usable for outgoing calls, although incoming calls can be
accepted.
● The switch automatically attempts to recover the signaling link.
1. Pay particular attention to the results of Test #636 (Primary Signaling Link Hardware
Check) in the test sequence.
● When the link does recover, the B channels 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).
e. Error Type 769: signaling link hardware error.
Service-affecting failures of the hardware used to transport the D channel are reported to
the ATM CES Signaling Group MO. Maintenance logs this error, places the D channel into
the OOS state, and raises a board-level alarm. The D channel is returned to service, and
the alarm is retired once the hardware failure condition clears.
f. 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 in-line 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
g. Error Type 1793: Layer 2 Query test for the primary signaling channel 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