AT&T 3.0 manual Outgoing Trunk Problems, Check for outside dial tone at the network interface

Trunk Errors

Outgoing Trunk Problems

If the system cannot sieze outgoing trunks, try the following procedure.

NOTE:

You cannot perform this procedure on a rotary telephone.

1Check for outside dial tone at the network interface.

For GS trunks, apply ground to the ring lead to get dial tone. If dial tone is not present, notify the customer.

2Pick up the handset of a test telephone to check for system dial tone. For a Hybrid/PBX system, dial *03.

3Dial the 2-digit trunk number (01-80) of the trunk you want to test.

4Listen for dial tone.

If dial tone is not present, use a test telephone to isolate the problems either to the module where the trunk terminates or to the location in the trunk access equipment.

If dial tone is present, dial a working outside number to verify that the call can be completed.

Dialing an outside number on a single-line telephone works only if the trunk accepts touch-tone dialing.

If you are using a single-line telephone to dial out to an E&M tie trunk or a T1 tie trunk, wait for a click before dialing the outside number.

If the trunk is busy, you hear a busy tone. If you dial a wrong trunk type (such as DID) or an invalid trunk number, you hear a reorder tone.

5 If the module continues to malfunction, replace it.

Central Office Problems 5–3