D9000/D7000 Series Operation & Installation Manual
Page 47
74-07692-000-C 4/97
Communications Failure
The panel goes into Communications Failure
after ten unsuccessful attempts to reach the
receiver. 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
Diagnosis
Remedy
The line rings but the
D6500 receiver does not
pick up.
RING indicator on line card
does not light. Can not hear
ring with headset at
receiver location.
Line is not ringing at the
receiver.
1.
Verify that the lines are correctly connected to the receiver.
2.
Verify that correct prefixes and phone numbers for the receiver
have been programmed into the panel.
If completing the steps above does not correct the problem, contact
your telephone company repair service.
The panel is unable to call
out when all 248 points are
faulted.
The total current draw is
too much for the panel.
Put command centers on a separate power supply to get maximum
current draw from points in alarm.
The line rings but the
receiver does not pick up.
RING indicator on line card
lights. Can hear ring with
test set at receiver location.
Line card in receiver may
be faulty.
Review receiver manuals for trouble shooting procedures.
The panel reaches a busy
signal for all ten attempts to
reach the receiver.
Calls are not reaching the
receiver.
1.
Verify that correct prefixes and phone numbers for the receiver
have been programmed into the panel.
2.
Verify that the phone lines are not shorted between the phone
company's equipment and the receiver by placing a call to the
number for the receiver. If you hear the line ring, but the ring
detector doesn't light, or if you hear a busy signal and the green
on line (OL) indicator is not lit, call the phone company for
service.
The receiver's call load is
too great.
Additional line cards and phone lines may be needed for the
receiver.
The receiver answers the
call and provides an
acknowledgment tone, but
the communicator does not
transmit reports.
The receiver is not
producing the correct
acknowledgment tone.
Verify that the receiver is producing a 1400 Hz, 2300 Hz, or Modem
IIIa
2 TM
acknowledgment tone.
Panel does not connect to
central station.
The D136 relay in J10 for
ground start phone
systems is inserted
incorrectly.
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.
The receiver answers the
call and provides an initial
“handshake”
acknowledgment, but does
not acknowledge the
panel’s report transmission
with a “kiss-off”
acknowledgment .
The receiver is not
compatible with the panel’s
transmission format.
Verify that the receiver is compatible with the format the panel is
using (either BFSK or Radionics Modem IIIa
2
™ Communications
Format). See
Phone in the D9000/D7000 Series Program Entry
Guide (74-07695-000).
The panel requires D6500 MPU and Line Card EPROM revision
8.00 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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