DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-23Fiber Fault Isolation Procedure
5
5. For each endpoint of the fiber-link, follow this flowchart:
Busyout
and
test board UUCSS long
and record all test failures. When
looking at test results, consult the explanations and illustrations of the
tests, which appear at the end of this procedure.
Is
Board Not Assigned
displayed for an EXP-INTF in an EPN? If yes,
test maintenance long
to release an EXP-INTF that may be held reset by
an EPN Maintenance circuit pack.
If No, did EXP-INTF test 242 fail? If yes, replace the EXP-INTF circuit pack
and the lightwave transceiver (if present) and go back to Step 4.
(EXP-INTF test 242 runs an on-board looparound if no lightwave
transceiver is connected to the EXP-INTF.)
If No, did SNI test 757 fail? If yes, replace the SNI circuit pack and go
back to step 4 of this procedure.
If No, did SNI test 756 fail? If yes, replace the SNI circuit pack and the
lightwave transceiver (if present) and go back to Step 4.
If No, did EXP-INTF test 240 fail? If yes, replace the EXP-INTF circuit pack
and go back to Step 4.
If No, did tests 238 (EXP-INTF) or 989 (SNI) fail? If yes, replace the
lightwave transceivers and fiber-optic cable, or metallic cable, and go
back to Step 4. The faulted component can be further isolated by using
the Manual Loopback Procedure described at the end of this procedure.
NOTE:
If a fiber out of frame condition exists and lightwave transceivers are
used, check that both lightwave transceivers are of the same type,
(9823a or 9823b). If they are not both the same, replace one of the
lightwave transceivers so that they match. (9823A is used for
distances up to 4900 feet (1493 m) and 9823B is used for distances
up to 25,000 feet (7620 m)).
If No, is a DS1 CONV administered on the fiber-link? If no, follow normal
escalation procedures.
If Yes, is there an SNI-BD 513 alarmed error (
display errors , category
=
pnc)? If yes, replace cabling between the SNI circuit pack and the DS1C
circuit pack.
If the alarm persists, replace the DS1C and the SNI circuit packs. and go
back to Step 4.
If No, if the connected circuit pack is an EXP-INTF, did Test #238 fail?
If Yes, replace cabling between the EXP-INTF circuit pack and the DS1C
circuit pack. If Test #238 continues to fail, replace the DS1C and the
EXP-INTF circuit packs and go back to Step 4.
If No, busyout and test board UUCSS long for both DS1C circuit packs
and note all test failures and aborts.
