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Trunk Errors
Ground-Start (GS) Trunk
The following events cause maintenance-busy on a ground-start trunk:
■
A seizure of the trunk is attempted that results in incomplete
handshaking (or no loop current) between the CO and the system.
After four occurrences, the trunk is put into a maintenance-busy state
and a permanent error is logged.
■
The CO fails to disconnect when the GS trunk is dropped by the
system.
After two occurrences, the trunk is put into a maintenance-busy state
and a permanent error is logged.
Loop-Start (LS) Trunk
No loop current exists when the LS trunk is seized. The port is marked
maintenance-busy, and a permanent error is logged after four occurrences.
TieTrunk
The following events cause maintenance-busy on a tie trunk.
A seizure of an outgoing tie trunk fails.
A transient error is reported. After four unsuccessful seizure attempts,
the port is marked maintenance-busy and the error becomes
permanent.
The CO fails to disconnect.
A transient error is reported. After two occurrences, the port is marked
maintenance-busy and the error becomes permanent.
NOTE:
The test is not run on auto-out tie trunks.
Maintenance-Busy Programming
You can select
Maintenance-Busy
as a system programming option. If you do,
there is also a menu selection to include tie trunks.
5-6 Central Office Problems