AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 190

100D Module Problems
If the test fails, find the error message in Table 4–8 and proceed as indicated.
Table 4–8. Internal Loopback Test Errors
Error Messages
Any errors on the CSU-lpbk Failed
screen
Any other error
4–100
Control Unit Problems
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.
Exit the test and try again; if this error persists, record
the errors on the repair tag and replace the module
being tested.
Exit the test and try again; if this error persists, record
the errors on the repair tag and replace the module
being tested.
Check the cable between the 100D module and the
CSU; then retest. If the problem persists, check the
CSU settings.
Exit the test and try again; if this error persists, record
the errors on the repair tag and replace the module
being tested.
Record the errors on the repair tag and replace the
module; if in doubt, escalate to your technical support
organization.