74-06666-000-B 12/93
© 1993 Radionics
D9112 Installation and Troubleshooting Quick Reference
Page 10
Phone Line Trouble
Phone line problems can result in the D9112 going into Communications Failure.
Symptom Diagnosis Remedy
SERVC PH LINE #1
(or 2 if two lines are
used) appears
in
command center
display.
D9112's phone line
monitor detects a
phone line as faulted.
1. Verify that the telephone cord is correctly
connected to the RJ31X and the D9112.
2. Verify the Ground Start Jumper is in the
correct position.
3. If using a ground start phone line, verify
D136 relay is in socket K6/J5.
4. Verify that the RJ31X jack is wired
correctly. The incoming phone line must
be wired to terminals 4 and 5. The in -
house phone system must be wired to
terminals 1 and 8.
5. Verify that all telephones are on-hook.
Leaving a telephone on hold after the
other party hangs up creates an off-hook
condition. Verify that no phones are on
hold.
If completing the steps above does not restore
the phone line, meter the phone lines. You
should meter at least 7.5 VDC when the line is
idle (on-hook). You should meter at least 13
mA of current when the line is active (off-hook).
If your readings are below the minimum values,
contact your telephone company repair
service.
Communications Failure
Follow the
Phone Line Trouble
procedure to verify that there is no problem with the phone lines
at the D9112 installation. If the phone lines are good, monitor the lines (preferably at the
receiver) for the symptoms listed below.
Symptom Diagnosis Remedy
The receiver answers
the call and provides
an initial “handshake”
acknowledgment, but
does not
acknowledge the
D9112's report
transmission with a
“kiss-off”
acknowledgment .
The receiver is not
compatible with the
D9112's transmission
format.
Verify that the receiver is compatible with the
format the D9112 is using (either BFSK or
Modem II). See
Phone
in the
D9112 Program
Entry Guide
(74-06145-000).
Modem II requires D6500 MPU and Line Card
EPROM revision 6.00 or higher.
Noisy phone lines are
interfering with report
transmission.
Try making a voice call to the receiver on the
line to verify the noisy condition. It may be
necessary to have the phone company check
the lines.
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