Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
555-650-140
Issue 1
June 1997
Error Logs, Access Logs, and System Inventory
Page 2-20
Error Logs
Table 2-2 Continued
Continued on next page
Error
Codes Description Action
840A BAD DOWNLINK MESSAGE:
Communication problems occurred
between the processor and the
modules. The module received an
unrecognized message from the
processor.
Turn the processor off and then on.
Repeat system programming procedure.
If the problem persists, replace the
module.
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.
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.
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.
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.