Lucent Technologies DDM-2000 OC-3, User & Service Manual

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363-206-285
Maintenance Description
9-38 Issue 3 June 2001
The installation tests can be controlled via either the user panel or the CIT. Three
different turnup procedures are provided and should be done in the order listed:
1. Local Equipment Test — The local equipment test verifies the integrity of
the transmission and synchronization circuit packs and the OC-3
backplane. In the test, high-speed signals are looped back (manual optical
loopback or EC-1 electrical loopback) towards the low-speed interfaces
(see Figure 9-17).
2. Local Wiring Cross-Connect Test — The local wiring cross-connect test
verifies the integrity of the cross-connect or wiring that is established. This
assumes local equipment tests have been performed and any problems or
failures have been corrected before this test is done. In the test, all low-
speed signals are looped back (manual loopbacks at the STSX or DSX,
see Figure 9-18).
Each of the tests described previously returns a good/fail result. If any circuit pack
failures are detected during the tests, the FAULT indicator on the failed circuit
packs are lit. If the wiring to the cross-connect panel is defective, the red FAULT
indicators on the low-speed circuit packs that detect incoming signal failures blink
for 1 minute. If the test passes, the green ACO indicator on the user panel is lit.
Good/fail is also reported to the CIT at the end of the test. Refer to the
test-
auto
command in Section 11, "Commands and Reports."