Basic Trouble Tests
VOICE TERMINAL
(WITH TROUBLE)
CONTROL UNIT
JACK FIELD
VOICE TERMINAL
(WITHOUT TROUBLE)
Figure 4—Switching Voice Terminals
Step 3.
Using the voice terminal known to be working, hold the
T/P
switch in the
T
(Test) position.
IF
THEN
The same trouble appears,
The trouble is not caused by the
voice terminal. It may be caused
by the control unit, expansion
module, cords, or cables. Return
the voice terminals to their origi-
nal position.
Go on to Step 4.
The trouble does not appear,
Trouble found.
It is caused by
the
first voice terminal.
Read the section on Maintenance
Exchange Procedures at the end of
this manual.
Page 16
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