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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
DS1 CONV system
Additional DS1-CONV loopback tests can further isolate the problem as shown in
Figure
2-18.
Test #797 loops at
Lightwave
internal interface
transceiver
Test #789
loops here
Figure 2-18. DS1 CONV loopback tests
Figure 2-18
If Test #799 fails at LB1, the problem is with DS1C #1, CSU #1, or the
connections between them.
If Test #799 passes at LB1 and fails at LB2, the problem is with CSU #1.
If Test #799 passes at LB1 and at LB2, the problem is with the DS1 facility,
CSU #2, connections to CSU #2, or DS1C #2.
For more information about loopback Tests #788 and #789 (isolates the
lightwave transceiver), see the DS1 CONV-BD section in Chapter 9 of
DEFINITY ECS Release 9 Maintenance for R9r .
DEFINITY
ECS
for DS1 facility
DS1C
CSU
shows that:
SREPN
Test #799
LB2
CSU
DS1 facility
Issue 2
November 2000
2-32
Tests 780,
Test #799
788, 797
LB1
799 start
here
DS1C
cydf059 KLC 022499
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