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DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN 555-233-121
2
SREPN Maintenance
Fault isolation procedures
5. If No , Did SNI Test #757 fail?
6. If No , Did SNI Test #756 fail?
7. If No , Did EXP-INTF Test #240 fail?
8. If No , Did Test #238 (EXP-INTF) or Test #989 (SNI) fail?
9. If No, Is a DS1 CONV administered on the fiber-link?
10. If No , if the connected circuit pack is an EXP-INTF, did Test #238 fail?
11. If No , busyout the circuit pack (busyout board UUCSS).
12. Test the circuit pack (test board UUCSS long) for both DS1C circuit packs
and note all test failures and aborts.
a. If Yes , replace the SNI circuit pack and go back to Step 12 in the
''Gather information''
a. If Yes , replace the SNI circuit pack and the lightwave transceiver (if
present) and go back to Step 12 in the
procedure above.
a. If Yes , replace the EI circuit pack and go back to Step 12 in the
''Gather information''
a. If Yes , replace the lightwave transceivers and fiber-optic cable and
go back to Step 12 in the
b. The faulted component can be further isolated by using information
in the
''Loopback tests''
c. 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).
a. If No and the problem is still present, follow normal escalation
procedures.
b. If Yes , is there an SNI-BD 513 alarmed error (display errors for
category pnc)? If yes, replace cabling between the SNI circuit pack
and the DS1C circuit pack.
c. If the alarm persists, first attempt the manual loopback procedure
below, then replace the DS1C and the SNI circuit packs and go back
to Step 12 in the
a. 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 EI circuit packs and go back to Step 12 in the
information''
procedure above.
NOTE:
Test #790 fails with Error Code 1 when in Survive mode.
procedure above.
procedure above.
''Gather information''
section later in this chapter.
''Gather information''
November 2000
''Gather information''
procedure above.
procedure above.
''Gather
Issue 2
2-29
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