Maintenance-Object Repair Procedures
555-233-143
8-608 Issue 1 May 2002
1320 FAIL A CSU module/T1 sync splitter hardware failure or an ICSU/T1 sync splitter
serial interface audit failure was detected by the TN767E DS1 circuit pack.
1. Replace the CSU module/T1 sync splitter, and then run the test again.
2. If the test continues to fail with this error code, replace the TN767E and run
the test again.
3. If the test continues to fail with this error code, the problem could be in the
I/O cable between the backplane and the CSU module
/T1 sync splitter.
1321 FAIL DTE LOS (loss of signal) was detected between the TN767E DS1 board and
the 120A1 CSU module or the T1 sync splitter. Either the TN767E board, the
120A1 CSU module/T1 sync splitter, or the I/O cable between the backplane
and the 120A1 CSU module or the 401A T1 sync splitter (or any combination
thereof) has failed. Attempt to isolate the problem to one of these areas.
1. Replace the CSU module/T1 sync splitter, and run the test again.
2. If the test continues to fail with this error code, then replace the TN767E
board, and run the test again.
3. If the test continues to fail with this error code, the problem could be in the
I/O cable between the backplane and the 120A1 CSU module or the 401A
T1 sync splitter.
1322 FAIL No 5-Volt power detected from the TN767E circuit pack to the 120A1 CSU
module/T1 sync splitter. Problem is probably due to an open fuse on the DS1
board or a faulty ICSU/T1 sync splitter. NOTE Do not swap DS1 boards as this
may open the fuse on the new board.
1. Remove the TN767E from the system and reinsert.
2. Run the test again once the board has finished its reset.
3. If the test continues to fail with this error code, then replace the CSU
module/T1 sync splitter, and run the test again.
4. If the test continues to fail with this error code, the problem could be in the
I/O cable between the backplane and the 120A1 CSU module or the 401A
T1 sync splitter.
5. If the test continues to fail with this error code, escalate this problem.
1323 FAIL A service-affecting CSU module/T1 sync splitter audit failure was detected by
the TN767E DS1 circuit pack. All administered ports on the DS1 circuit pack
are affected and maintenance software will place the ports into the
out-of-service state.
1. Replace the 120A1 CSU module/T1 sync splitter.
Table 8-245. Test #138 Loss of Signal Alarm Inquiry Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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