Installation guide
Bosch Security Systems | 11/03 | 39352E
EN | 48
D9124 | Operation & Installation Guide |
12. Troubleshooting
12.6 Communication Failure
The control panel goes into communication failure after ten unsuccessful attempts to reach the receiver. Check Table
19 in Section 12.5 Phone Line to verify 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 shown in Table 20.
Table 20: Communication Failure
Problem Diagnosis Solution
The line rings but the
D6500/D6600 Receiver does not
pick up. The Ring Indicator LED on
the line card does not light. You
cannot hear the ring with a
headset at the receiver location.
Line is not ringing at the
receiver.
•
Verify the lines are correctly connected to the
receiver.
•
Verify correct prefixes and phone numbers for the
receiver are programmed into the control panel.
•
If completing the previous steps does not correct
the problem, contact your telephone company repair
service.
The control panel cannot call out
when all 246 points are faulted.
The total current draw is too
much for the control panel.
Put the command centers on a separate power supply
for the maximum current draw from points in alarm.
The line rings but the receiver
does not pick up. The Ring
Indicator LED on the line card
lights. You can hear the ring with
test set at the receiver location.
Line card in the receiver may be
faulty.
Review the receiver manuals for troubleshooting
procedures.
•
Calls are not reaching the
receiver.
•
Verify the correct prefixes and phone numbers for
the receiver are programmed into the control panel.
•
Confirm 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 and the ring detector does not
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 control panel reaches a busy
signal for all ten attempts to reach
the receiver.
•
The receiver's call load is
too great.
•
Additional line cards and phone lines might 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 the receiver is producing a 1400 Hz, 2300 Hz, or
Modem IIIa
2
acknowledgment tone.
The control panel does not
connect to the central station.
The D136 relay used for ground
start phone systems is inserted
incorrectly.
Insert the D136 relay in the GND START socket
correctly. Also, ensure the phone line is connected and
the phone jack is wired properly. Refer to
Section 9.11.1
Relay Installation
for instructions.
•
The receiver is not
compatible with the panel’s
transmission format.
•
Make sure the receiver is compatible with the format
the control panel is using (either BFSK or Radionics’
Modem IIIa
2
Communications Format). See Phone in
the
D9412G/D7412G Program Entry Guide
.
•
The D6500 Receiver requires MPU and Line Card
EPROM revision 8.00 or higher, or use the D6600
Receiver.
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.
•
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 might be necessary to
have the phone company check the lines.