Avaya MCC1 Maintenance Procedures page 266

Packet and serial bus maintenance
S8100 packet bus fault isolation and repair
Table 65: Packet bus circuit packs
Circuit Pack Name
ISDN-BRI
Maintenance/Test
For each circuit pack type (see
steps:
NOTE:
The circuit packs need not be checked in the order presented if the flowchart in this
chapter has been followed. However, if newly added circuit packs are involved, check
these packs first, inasmuch as the packs are most likely to have caused a problem.
1 Display the Error and Alarm Logs for the circuit pack via the display errors and display
alarms commands.
2 If there are errors for the circuit pack, refer to the appropriate maintenance documentation in
Communication Manager Maintenance-Object Repair
Reference (555-245-102), and follow the recommended maintenance procedure to resolve the
errors. Note that some of these procedures may refer to PKT-BUS maintenance as the cause of the
fault; if so, implement these Packet Bus Fault Correction procedures at that point.
3 After implementing the repair procedure for the circuit pack (and regardless of whether this
procedure succeeds or fails), determine if the Packet Bus fault is still present.
4 If the Packet Bus fault is still present, implement Procedure 1 for the next circuit pack.
5 If there are no more circuit packs in the list, go to Procedure 2.
6 If the Packet Bus fault has been resolved, the procedures are completed.
Procedure 2
Procedure 2 removes and reinserts port circuit packs (those in the purple slots) one or several at a time.
Use Procedure 2 for each port circuit pack in the port network until either (1) the problem is resolved or
(2) there are no more circuit packs in the port network.
NOTE:
This procedure should also be used for the TN570 Expansion Interface circuit pack in a
standard system. For a High or Critical Reliability system, refer to Procedure 3 for the
Expansion Interface circuit pack. Also, refer to Procedure 3 for the TN768 or TN780
Tone-Clock circuit pack in a switch with a High or Critical Reliability system.
CAUTION:
The Expansion Interface circuit pack should be the last one checked in this procedure,
since removing this circuit pack disconnects its EPN. The Tone-Clock circuit pack should
be the next-to-last one checked. In addition, the TN771 must be reseated after the Tone-
Clock is reinstalled.
266
Circuit Pack
Code Associated Maintenance Objects
TN556 BRI-BD, BRI-PORT, ABRI-PORT,
BRI-SET, BRI-DAT, ASAI-ADJ
TN771 M/T-BD, M/T-PKT
Table 65, Packet bus circuit packs, on page 266), perform the following
Procedures, in Maintenance Alarms
Maintenance Procedures
December 2003