AT&T 3.0 manual Incoming Trunk Problems, Testing Trunks Automatically, Maintenance-Busy Status

Trunk Errors

Incoming Trunk Problems

If incoming trunks do not work properly, try the following procedure.

1 Place an incoming call through the troubled trunk.

For a loop-start (LS) trunk, connect a single-line telephone to the trunk at the network interface.

For a ground-start (GS) trunk, connect a single-line telephone to the trunk at the network interface and press the GS button. (For GS trunks, the telephone must have a GS button attached to it.)

2Listen for ringing.

3Pick up the handset and check line seizure.

4Dial an outside number and verify that you have good two-way transmission.

5At the maintenance terminal, check the trunk programming to be sure this trunk has been properly translated.

See the system planning forms.

6If 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.

5-4Central Office Problems