Troubleshooting
Phone Lines
Method 2
Two phones can be connected to a link other than the test phone link to allow them to talk
or send tones without affecting test phone commands. This will allow the advanced trou-
bleshooter to perform additional tests (e.g.: voltage measurements, functional checks, etc.).
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Dial
#73,
note the display phone’s test LL
Display Field;
then, enter the physical number of
a phone line (phone
A)
to be tested.
Press [0] or
[8]
to change the
LL
Display Field
to a value different than that being used by
the test phone.
Press
[1]
to connect phone A to the selected link.
Press
[
7]
or
[
*]
to display the physical number of another phone line to be tested (phone
B)
Press
[1]
to connect phone
B
to the selected link and verify an audio connection between
phones
A
and
B.
Using phones
A
and
B,
perform whatever tests are desired. During this time, the test phone
may be hung-up and phones
A and
B
will remain out of service.
Upon completion of testing, either disconnect phones
A
and
B
by pressing [4] on the test
phone or reset the system.
Call-in
Switches
The main program detects the status of each call-in
switch
as a function of its relationship to
ground. This enables the system to distinguish different types of call-ins. In case of problems
perform the
#74
RP2
Adjustment Procedure.
step 1.
Step 2.
Step
3
Dial
#73,
then
enter the lowest or highest physical number of the call-in switch lines to lx
tested
Note
t
he
character displayed in the
HT
display
field
G
= ground on the T terminal, indicating an active normal call-in.
R =
resistive ground on the
T
terminal, indicating an active emergency call-in.
N = no connection is detected on the
T
terminal,
indicating the switch is passive.
Place a normal or emergency call-in, or simulate one as follows.
Normal
Ground
the
call-in line.
Emergency
Place a 1.5k resistor to ground on the call-in line.
Step 4.
Verify
t
he
LIT display field changes and provides
the
correct indication (as defined in Step 2).
Step 5.
Repeat steps
3
and 4 for any untested switch positions, ending with the N displayed. Then,
press
[7]
or
[
*]
to go to the next physical number and return to Step 2 to continue testing.
Page 10 of 30
1989
Rauland-Borg Corporation
(Chg.
10/88; Rev.
t/89)
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