AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual page 161

Central Office Problems
Outgoing Trunk Problems
Symptom
Outgoing trunks cannot be seized.
NOTE:
You cannot perform this procedure on a rotary telephone.
Procedure
1.
At the network interface, check for a dial tone from the central office. If
a dial tone is not present, notify the customer.
NOTE:
For GS trunks, apply ground to the ring lead to get a dial tone.
2.
Pick up the handset at a test telephone to get a system dial tone.
3.
For a Hybrid/PBX system, dial
4. Dial the 2-digit trunk number of the trunk to be tested (01 - 60).
5.
Listen for a dial tone.
6.
If a dial tone is not present, use a test telephone to isolate the fault to
the module where the trunk terminates or to the location in the trunk
access equipment.
7.
If a dial tone is present, dial a working outside number to verify that the
call is complete.
NOTE:
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.
03 .
Trunk Errors 5-3