Installation guide

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