DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-21Fiber Fault Isolation Procedure
5
Fiber Fault Isolation Procedure
Use the following procedure to isolate faults on a fiber-link. When troubleshooting
a system with duplicated Port Network Connectivity (PNC), first
busyout
pnc-standby
before busying out a standby Fiber-Link (FIBER-LK), Expansion
Interface (EXP-INTF), Switch Node Interface (SNI) or DS1 Converter (DS1C). At
the end of this section is a description of the loopback tests run and a pinout of
the cable used to connect the DS1 C to DS1 facilities.
■ A busyout of any of these components on a simplex PNC is destructive.
■ Be sure to release all busied out components after completing the tests.
Steps:
1. Enter
display alarms
with category
pnc
.
Are there any on-board alarms? If so, replace the circuit pack(s).
2. Enter
display errors
for category
pnc
.
Check for any of the following errors:
If
one or more
of the above errors are present go to step 3.
If
none
of the above errors are present, look for SNI-PEER errors.
■ If there is one SNI circuit pack with many different SNI-PEER error
types, replace the indicated SNI circuit pack
■ If there are many SNI-PEER errors of the same error type, replace
the indicted SNI circuit pack using the following table.
Maintenance
Object
Error
Type
FIBER-LK Any
SNI-BD 513
EXP-INTF 257
769
770
1281
1537
3073
3074
3075
3076
3585
3841
3842
