Table 4-4. Csu Loopback Test Errors - AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual

Control Unit Problems
Step
9
CSU-lpbk Slot xx:
CSU-lpbk Failed
xxxxxxxxxxxxxxxxxxxxxxx
xxx xxx xxx xxx xxx xxx
xxx xxx xxx xxx xxx xxx
xxx xxx xxx xxx xxx xxx
E x i t
Interpreting the Test Results
If the test completes successfully, the connection between the CSU and the
100D module is good, and the 10OD module is probably OK. Continue with
the next module test or restore the module if finished testing.
If the test fails, find the error message in Table 4-4 and proceed as indicated.

Table 4-4. CSU Loopback Test Errors

Error Message
Slot is not
busied-out
Slot empty or not
valid
FMWR not in Standby
Mode
4-56 100D Module Problems
Display
Corrective Action
Exit the test, busy-out the slot, and try again.
Exit the test and try again; be sure to type the
correct slot number. Do not indicate an
empty slot or the processor (00).
Exit the test and try again; if this error
persists, record the errors on the repair tag
and replace the module being tested.
Instructions
This screen appears when the test fails.
Lines 3 through 6 identify the cause of the
failure or the number of errors found per
channel. There are 24 channels,
numbered 1 through 24. Line 3 displays
the results for channels 1 through 6; Line 4
is for channels 7 through 12. Line 5 is for
channels 13 through 18. Line 6 is for
channels 19 through 24.
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