Avaya MCC1 Maintenance Procedures page 240

Packet and serial bus maintenance
Isolating and repairing packet-bus faults
CAUTION:
Packet-bus fault isolation procedures involve removing circuit packs and possibly
disconnecting entire carriers. These procedures are destructive. Whenever possible,
implement these procedures during hours of minimum system use.
To replace the following circuit packs, follow instructions in the appropriate sections:
• IP-SVR (IP Server Interface)
• EXP-INTF (Expansion Interface Circuit Pack)
When the procedure asks whether the packet-bus problem has been resolved, all of the following
conditions should be met:
• Every faulty lead reported by the TN771D's stand-alone mode should no longer be reported.
• Every alarm against the packet bus and the TN2312AP IPSI circuit pack's Packet Interface circuit
has been resolved.
• Every ISDN-BRI station and data module and every relevant ASAI- and system port-supported
adjunct is in service.
Procedure 1: circuit pack fault detection
Procedure 1 determines whether any circuit packs that use the packet bus have faults. For each circuit
pack type in Table 64, Packet circuit packs,
these circuit packs in the order presented by the flowchart shown earlier in this discussion — unless
newly inserted circuit packs are involved. Newly added boards are the most likely cause of a problem.
1 Display errors and display alarms for the circuit pack.
2 For any errors or alarms, follow the repair actions.
3 After following the recommended repair actions, whether they succeed or fail, determine whether
the packet-bus fault is resolved. If so, you are finished.
4 If the packet-bus fault is still present, apply this procedure to the next circuit pack.
5 If there are no more circuit packs in the list, go to
circuit packs.
Table 64: Packet circuit packs
Circuit Pack Name
ISDN-BRI
Maintenance/Test
240
on page 240 proceed through the following steps. Check
Code Associated maintenance objects
TN556 BRI-BD
BRI-PORT
ABRI-PORT
BRI-SET
BRI-DAT
ASAI-ADJ
TN771D M/T-BD, M/T-PKT
Procedure 2: removing and reinserting port
Maintenance Procedures
December 2003