Ground-Start GS Trunk, Loop-Start LS Trunk, TieTrunk

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.

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.

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-busyand the error becomes permanent.

The CO fails to disconnect.

A transient error is reported. After two occurrences, the port is marked maintenance-busyand the error becomes permanent.

NOTE:

The test is not run on auto-out tie trunks.

You can select Maintenance-Busyas a system programming option. If you do, there is also a menu selection to include tie trunks.

5-6Central Office Problems