Phone Line Trouble; Communications Failure - Radionics D9000 Series Installation And Troubleshooting Quick Reference

Phone Line Trouble

Communications Failure

33317D 4/97
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Phone line problems can result in the panel going into Communications Failure.
Symptom
SERVC PH LINE #1
(or 2 if two lines are
used) appears in
command center
display.
Follow the Phone Line Trouble procedure to verify that there is no problem with the phone
lines at the installation. If the phone lines are good, monitor the lines (preferably at the
receiver) for the symptoms listed below.
Symptom
Panel does not The D136 relay in J10
connect to central for ground start phone
station. systems is inserted
incorrectly.
The receiver The receiver is not
answers the call compatible with the
and provides an D9412/D9112
initial "handshake" transmission format.
acknowledgment,
but does not
acknowledge the
D9412's report
transmission with
a "kiss-off"
acknowledgment .
Noisy phone lines are
interfering with report
transmission.
D9000/D7000 Series Installation and Troubleshooting Quick Reference
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Diagnosis
D9412/D9112 phone 1. Verify that the telephone cord is correctly
line monitor detects a connected to the RJ31X and the panel.
phone line as faulted.
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 4.5 to 7.5 VDC when the
line is idle (on-hook). You should meter 8 to
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.
Diagnosis
Insert the D136 relay in socket J10
correctly. Also check that phone line is
connected and that phone jack is wired
properly. See the Relays section of this
manual for instructions.
Verify that the receiver is compatible
with the format the D9412 is using
(either BFSK or Radionics Modem
2
IIIa ™ Communications Format). See
Phone in the D9412/D9112 Program
Entry Guide (74-07695-000).
D9412/D9112 requires D6500 MPU and
Line Card EPROM revision 8.00 or
higher.
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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Remedy
Remedy