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 proced ure 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 stand by Fiber-Link (FIBER-LK), Expansion
Inter face (EXP-INTF) , Swit ch No de In terfa ce (SN I) or DS1 Con verte r (DS1 C). At
the end of this section is a d escription of the loopb ack tests run and a pinou t of
the cable used to c onnect the DS1 C to DS1 facilities.
■A busyout of any of these comp onents on a simplex PNC is destructive.
■Be sure to release all busied out c omponents after comple ting the tests.

Steps:

1. Enter display alarms with category pnc.
Are there any on-board alarms? If so, replac e 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 abov e erro rs are prese nt, lo ok for SNI-PEER er rors.
■If the re is o ne SNI c ircu it p ack w ith ma ny di fferen t SNI-PEER e rror
types, replace the indicated SNI circuit pack
■If the re are m any SNI -PEER erro rs of t he sam e erro r typ e, rep lac e
the indicted SNI circ uit pack using the following table.
Maintenance
Object Error
Type
FIBER-LK A ny
SNI-BD 513
EXP-INTF 257
769
770
1281
1537
3073
3074
3075
3076
3585
3841
3842