Avaya DEFINITY Server CSI Maintenance Manual page 749

ATM-SGRP (ATM Signaling Group)
There is no test to clear these errors. The error counter is decremented by
1 every 15 minutes.
b. Error Type 18: the ATM circuit pack has been busied out (either busyout
atm sig-grp or busyout board UUCSS).
1. Release the ATM signaling group (release atm sig-grp) or the
c. Error Type 257: the primary signaling channel connection has been lost for
more than 90 seconds.
1. Look at the results of Test #636 (Primary Signaling Link Hardware
2. When this error occurs, the state of the Signaling Group is changed
d. 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.
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 in-line error is
considered a Degraded PVC Alarm:
555-233-119
circuit pack (release board UUCSS).
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.
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.
to out-of-service (verify using the status sig-group command).
Excessive AAL - The AAL layer is experiencing an excessive
number of errors in trying to reconstruct Service Data Unit (SDUs).
Possible causes:
— Something may be wrong with the ATM switch.
— The communication paths on the other side of the ATM
switch may be noisy.
— The sending node might not be healthy.
— Could be a problem with congestion on the ATM switch.
Issue 5 October 2002
749