AT&T MERLIN Plus System Manual page 182

SYMPTOM: You can't place outside calls (continued).
Possible Cause 6: Faulty telephone company wiring.
Do This
At the control unit location,
find the network interface
associated with the outside
line from which you cannot
make a call. Unplug the
line cord from the network
interface and, in its place,
plug in a basic Touch-Tone
or rotary telephone. (Do not
use a MERLIN system
voice terminal.) Try to
place an outside call
from the telephone.
Possible Cause 7: Faulty network interface line adapter.
Do This
Replace the network
interface line adapter with
another one. Plug the basic
telephone into each of the
jacks, and try to place an
outside call.
If
The trouble appears on the
basic telephone and the
network interface uses a line
adapter
The trouble appears on the
basic telephone, and the
network interface does not
have a line adapter
I f
The trouble still appears on
the basic telephone
The trouble does not appear
on the basic telephone
Troubleshooting Procedures
Then
Go to Possible Cause 7.
Your outside line is faulty.
Report the trouble to your
local telephone company
representative.
Then
Your outside lines are faulty.
Report the trouble to your
local telephone company
representative.
The old line adapter is
faultry. Replace it with a
new line adapter.
7-3