Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 70

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Error Logs, Access Logs, and System Inventory
Error Logs
Table 2-2 Continued
Error
Codes Description
840A BAD DOWNLINK MESSAGE:
Communication problems occurred
between the processor and the
modules. The module received an
unrecognized message from the
processor.
840B NO LOOP CURRENT:
Communication problems between
the module and the central office. No
loop current.
If this error occurs four times
consecutively, and if Automatic
Maintenance-Busy is enabled and
the 50% maintenance-busy limit has
not been exceeded, the trunk is
busied-out automatically.
840C STUCK RINGING:
Communication problems between
the module and central office.
If this error occurs four times
consecutively, and if Automatic
Maintenance-Busy is enabled and
the 50% maintenance-busy limit has
not been exceeded, the trunk is
busied-out automatically.
Action
Turn the processor off and then on.
Repeat system programming procedure.
If the problem persists, replace the
module.
Replace the module with a similar
module and test. If the problem is
resolved, replace the bad module. If the
problem persists, reinstall the old module
and test the trunk.
Replace the module with a similar
module and test. If the problem is
resolved, replace the bad module. If the
problem persists, reinstall the old module
and test the trunk.
Continued on next page
Issue 1
June 1997
Page 2-20