AT&T MERLIN LEGEND Installation & Maintenance Manual page 521

Maintenance and Troubleshooting
4. Dial the 2-digit line/trunk number of the line/trunk to be tested
(01-80).
5. Listen for a dial tone. if a dial tone is not present, use a test
set to isolate the fault to the line/trunk and station module
where the line/trunk terminates or to the location in the
line/trunk access equipment.
6. If a dial tone is present, dial a working outside number. Verify
that the call is complete.
If the line/trunk is busy, you hear a busy tone. You hear a
reorder tone if a wrong line/trunk type (such as DID) or an
invalid line/trunk number was dialed.
7. If the module continues to malfunction, replace it.
Incoming Line/Trunk Problems
Symptom:
Incoming lines/trunks do not work properly.
Procedure:
1. Place an incoming call through the troubled line/trunk.
2. For an LS or GS line/trunk, connect a single-line telephone to
the line/trunk at the network interface. (If the line/trunk is a GS
line/trunk, you need to have a GS button attached to the
telephone.) Press the GS button for a GS line/trunk. Listen for
ringing. Pick up the handset and check line seizure. Dial an
outside number and verify that you have good two-way
transmission.
At the maintenance terminal, check the line/trunk translations
3.
to be sure this line/trunk has been properly translated. (See
the system planning forms.)
4. If the module continues to malfunction, replace it.
Maintenance 5-43