DS1-BD (DS1 Interface Circuit Pack)
Issue 4 May 2002
10-635555-233-123
1311 FAIL The Integrated CSU (I-CSU) Module Equipment Loopback (ELB)
test (#1210) failed. This test is executed during ICSU/T1 Sync
Splitter power-up/reset (the TN767E board is physically inserted
and the CSU Module/T1 Sync Splitter is already installed) or
when the 120A CSU Module/T1 Sync Splitter is plugged on to an
already initialized DS1 board. The ELB test is also executed as
part of the command test ds1-loop UUCSS
ds1/csu-loopback-tests.
1. Execute test ds1-loop UUCSS ds1/csu-loopback-tests.
2. If the ELB test continues to fail, then either the TN767E
board, the CSU Module/T1 Sync Splitter, or the I/O cable
between the backplane and the CSU Module/T1 Sync
Splitter (or any combination thereof) has failed. Attempt to
isolate the problem to one of these areas. Begin by replacing
the CSU Module/T1 Sync Splitter and running the test
ds1-loop UUCSS ds1/csu-loopback-tests command again.
3. If the ELB test continues to fail, then replace the TN767E
board and run test ds1-loop UUCSS
ds1/csu-loopback-tests again.
4. If the ELB test continues to fail, the problem could be in the
I/O cable between the backplane and the CSU Module/T1
Sync Splitter.
1312 FAIL The Integrated CSU (I-CSU) Module Repeater Loopback (RLB)
test (#1211) failed. This test is executed during ICSU/T1 Sync
Splitter power-up/reset (the TN767E board is physically inserted
and the CSU Module/T1 Sync Splitter is already installed), or
when the 120A1 CSU Module/T1 Sync Splitter is plugged on to
an already initialized DS1 board. The RLB test is also executed
as part of the command test ds1-loop UUCSS
ds1/csu-loopback-tests.
1. Execute test ds1-loop UUCSS ds1/csu-loopback-tests.
2. If the RLB test continues to fail, then replace the CSU
Module/T1 Sync Splitter.
3. Run this test again.
Table 10-235. TEST #138 Loss of Signal Alarm Inquiry Test — Continued
Error
Code
Tes t
Result Description/Recommendation
Continued on next page
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