Lucent Technologies MERLIN Plus Release 2 System Manual page 322

SYMPTOM: A VOICE
TERMINAL RINGS
CONSTANTLY.
7-6 Troubleshooting Procedures
Possible Cause 3:
Cable connections.
Do This
Step 1.
Go to the control unit and
locate the intercom jack for
the malfunctioning voice
terminal and an intercom
jack for a working voice
terminal. Unplug both from
the control unit and replug
each into the other's jack.
See if the trouble now occurs
on the working voice
terminal.
Step 2.
Test each cable in the wiring
run to the malfunctioning
voice terminal by following
this procedure:
a. Connect the wiring run to
a functioning voice terminal.
b. Replace the first cable in
the wiring run with one
known to be working.
Possible Cause:
Voice terminal T/P switch isn't in the center position.
Do This
Check T/P switch position.
If
The trouble occurs on the
previously working voice
terminal
The trouble no longer occurs
on the working voice
terminal
The trouble still occurs
The trouble no longer occurs
If
It is set at either T or P
The T/P switch is in the
center position
Then
The problem is caused by
your control unit. Call your
equipment supplier for
assistance.
The trouble is caused by a
cable (there may be more
than one) in the wiring run to
the malfunctioning voice
terminal. However, check
the previous two causes for
this symptom first. If the
problem persists, go on to
Step 2 of this cause.
Check the connection; if the
connections are correct and
secure, remove the second
cable in the wiring run and
replace it with another cable
that is known to work
properly. If the problem still
occurs, replace the third
cable in the run and so on
until all the cable in the run
has been replaced. If the
problem still persists, call
your local equipment
supplier for assistance.
The cable was the source of
the problem; discard the
malfunctioning cable.
Then
Slide it to the center position
Your voice terminal is faulty.
Unplug it from the modular
jack and try another voice
terminal in its place.