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Alarms, Errors, and Troubleshooting
555-233-143
4-26
Issue 1 May 2002
If DS1Cs exist on the fiber link (check with list fiber-link), then additional
DS1CONV loopback tests can be run to further isolate the problem. The loopback
tests are shown in
. For more information about
Loopback tests (#788 and #789), see:
■
‘‘Far-End DS1 Converter Circuit Pack Loopback Test (#788)’’ on page
8-707
■
‘‘Far-End Lightwave Transceiver Loopback Test (#789)’’ on page 8-709
For more information about DS1 Facility Loopback tests (#797 and #799), see:
■
‘‘Far-End Internal Loop-Back Test (#797)’’ on page 8-676
■
‘‘Near-End External Loop-Back Test (#799)’’ on page 8-679
Figure 4-5.
DS1 CONV Loopbacks
Tests 788, 780, 797,
and 799 start here:
. . . .
.
.
.
.
.
.
.
.
.
.
.
. . . .
Test 797 loops at internal
interface for the DS1 facility
Test 789
loops here
Test 788
loops here
lightwave
transceiver
DS1 Facility
CSU 2
DS1C
2
CSU 1
DS1C
1
Test 799
LB 1
Test 799
LB 2
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...