Avaya DEFINITY SERIES, Installation And Maintenance Manual, Page: 86 / 101

DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
SREPN Maintenance
2-32 Fault isolation procedures
2
DS1 CONV system
Additional DS1-CONV loopback tests can further isolate the problem as shown in
Figure 2-18 .
Figure 2-18. DS1 CONV loopback tests
Figure 2-18 shows that:
■
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 .
cydf059 KLC 022499
DS1C DS1C CSU CSU
DEFINITY
ECS SREPN
Lightwave
transceiver
Test #797 loops at
internal interface
for DS1 facility
Test #789
loops here
DS1 facility
Test #799
LB2
Test #799
LB1
Tests 780,
788, 797
799 start
here