Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 235

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Central Office Problems
Trunk Errors
At the maintenance terminal, check the trunk programming to be

sure this trunk has been properly translated.
See the system planning forms.
If the module continues to malfunction, replace it.

Testing Trunks Automatically
The automatic maintenance program takes the ports out of service when a trunk
is malfunctioning. When a port is out of service, it is maintenance-busy . The
trunk is periodically tested and put back into service if possible.
Maintenance-Busy Status
When maintenance-busy is enabled and a trunk cannot be seized for an
outgoing call, the trunk is automatically put into a maintenance-busy state.
When a trunk is in a maintenance-busy state, no outgoing calls can be placed
on it. However, the trunk can still receive incoming calls.
NOTE:
Maintenance-busy does not apply to DID trunks, since DID trunks cannot
be used to make outgoing calls.
While the trunk is in a maintenance-busy state, the software periodically runs
tests, attempting to seize the trunk:
If the seizure is unsuccessful, the trunk stays in a maintenance-busy
state.
If the seizure is successful, the trunk is placed back in service.
If a test is running when an incoming call is received on the trunk, the test
is dropped and the call is processed.
Issue 1
June 1997
Page 5-5