DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
SREPN Maintenance
2-30
Fault isolation procedures
2
13. Did the test return
Board not inserted
for the near-end circuit pack
(nearest the SPE), or for the far-end circuit pack in a simplex PNC?
a. If
Yes
, replace the cabling between the DS1C circuit pack and the
SNI or EI circuit pack.
b. Wait 1 minute and retest.
c. If the board is still not inserted, replace the DS1C circuit pack and
the EI or SNI connected to it and Go back to Step 12 in the
‘‘Gather
information’’
procedure above.
14. If
No
, visually check to see if any CSU devices are looped back.
a. Busyout the circuit pack (busyout board UUCSS).
b. Test for external loopback (test ds1-facility UUCSS external-loop)
for each DS1 facility.
NOTE:
Many tests pass if the system is in Survive mode.
15. Did Test #788 pass and Test #789 fail?
a. If yes, replace the DS1C and lightwave transceiver (if present) at the
other end of the DS1C complex. (See
Figure 2-18 on page 2-32
)
b. Go back to Step 12 in the
‘‘Gather information’’
procedure above.
16. If
No
, did Test #788 fail or abort and Test #789 fail or abort?
a. If
Yes
, enter test ds1-facility UUCSS long for each administered
and equipped DS1 facility.
NOTE:
If the Switch Node Interface (SNI) board’s yellow LED is fast flashing
(0.1 sec on/0.1 sec off), it can indicate a problem with the fiber from
the SNI board to the SREPN. For more detailed information, refer to
the SNI-BD Maintenance Object in Chapter 9 of
DEFINITY ECS
Release 9 Maintenance for R9r
.
Loopback tests
The following section describes loopback tests:
■
‘‘Fiber direct-connect system’’
■
■