Alarms, Errors, and Troubleshooting
555-233-143
4-106
Issue 1 May 2002
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
proceed through the following
steps. Check 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 recommended in
Chapter 8, ‘‘Maintenance-Object Repair Procedures’’
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
and Reinserting Port Circuit Packs
.
Procedure 2: Removing and Reinserting Port
Circuit Packs
Procedure 2 removes and reinserts port circuit packs (purple slots) and the EI
circuit pack one or several at a time. Use Procedure 2 for each port circuit pack in
the EPN until every port circuit pack has been tried or the problem is resolved.
NOTE:
An EI circuit pack should be the last one checked since removing it
disconnects the EPN. To check an active EI in a critical-reliability system
(duplicated PNC), use reset pnc interchange to make it the standby.
Always check the standby’s status before executing an interchange.
NOTE:
A Tone-Clock circuit pack should be the next-to-last one checked. (The
TN771D must be reseated after the Tone-Clock is reinstalled.) Refer to
Procedure 3 on page
for the TN768, TN780, or TN2182 Tone-Clock
circuit pack in a high- or critical-reliability system.
Table 4-8.
Packet Circuit Packs
Circuit Pack Name
Code
Associated Maintenance Objects
ISDN-BRI
TN556
BRI-BD, BRI-PORT, ABRI-PORT, BRI-SET, BRI-DAT, ASAI-ADJ
Maintenance/Test
TN771D M/T-BD, M/T-PKT
Universal DS1
TN464F
UDS1-BD, ISDN-LNK
Expansion Interface
TN570
EXP-INTF
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...