Fault Isolation for Fiber Links
Issue 1 May 2002
4-25
555-233-143
Test #242 can be run as part of the test board UUCSS long command for an EI
circuit pack. Besides testing on-board components, this test is helpful for isolating
problems between a circuit pack and the lightwave transceiver. The loopback
shown in this diagram shows only part of what Test #242 does. If no lightwave
transceiver is connected to the EI circuit pack, an on-board loopback is performed
on the EI circuit pack. For more information about Test #242, see
(Expansion Interface Circuit Pack)’’ on page 8-762
Figure 4-4.
Tests for Isolating Fiber Faults
Tone
Clock
Tone
Detector
Test
#242
fiber-optic
cable
TDM BUS
back skin
of cabinet
lightwave
transceivers
TN753
Switch
Node
Interface
Test
#757
Test
#756
TN570
Expansion
Interface
back skin
of cabinet
Test #989 (framing)
Test #238 (framing)
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 ...