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D7024 | Operation and Installation Guide | 14.0 Appendix E: Telephone Monitor Troubleshooting
14.0 Appendix E: Telephone
Monitor Troubleshooting
14. 1
COMM FLT/DATA LOST
A common cause of the COMM FLT/DATA LOST
fault is failing to program Phone Number 2 or Account
Number 2 while some reports are directed to Phone 2
Backup. The reports continue to be made to Phone
Number 1, but this message warns the installer Phone
Number 2 is not available if it becomes needed.
Other communications problems that might cause this
condition include:
•
Events occurring faster than the dialer can send
them, overflowing the 32 event buffer
•
Programming errors such as missing telephone
numbers or account codes
•
More than 100 trouble type reports in 24 h
•
Other problems in contacting a receiver.
Check the dialing type, format selection, telephone
numbers, account codes, telephone line condition, and
tone programming (if tone burst formats are used).
Refer to Section 5.7 Communicator Operation on page 29
for more information.
14.2
Trouble Telephone
To troubleshoot telephone monitor problems:
1.
Use a voltmeter to measure the voltage across each
telephone line (tip to ring) while the telephone line
is idle.
The voltage present during ringing for an
incoming call can be more than 100 VAC.
•
Generally, this standby Telco battery voltage
ranges from 30 VDC to 50 VDC. Any voltage
above 5 VDC is accepted by the control panel.
•
The polarity of the voltage does not matter.
2. Check for other devices that might use the
telephone line, such as fax machines, credit card
verifiers, or PBX systems.
•
Note that NFPA 72 requirements mandate a
dedicated telephone line for fire reporting.
•
If the devices cannot be removed, ensure they
are wired so the control panel's line seizure
relay disconnects them when needed.
•
Measure the line voltage while these devices are
in use, ensuring it remains above 5 V.
78
3. Check for intermittent faults in the telephone line.
•
Make a test call and verify the line is free of
distortion and noise.
•
Temporarily swap Lines 1 and 2 on the control
panel to verify the problem indication moves to
the control panel's other telephone line
channel. In this case, the telephone line is
causing the problem rather than the line
monitor.
4. Verify the fault message is Phone Fault and not
Com Fault.
•
Com Fault is often caused by failing to
program a telephone number or account
number for Phone Number 2 while routing
reports to Line 1, Backup Line 2.
•
If only one telephone number is available for
reporting, set report steering for all events to
Phone 1 only.
•
Com Fault can also be caused if one of the
telephone lines has Telco battery voltage, but
does not complete a call. Make test calls to the
receiver(s) on both telephone lines, listening for
the receiver ACK tone.
5. Ensure two telephone lines are available.
According to NFPA requirements, the Auto Test Report
is sent on a different telephone line each time it is sent.
If only one telephone line is connected to the control
panel, a Com Fault is generated on every other test
call.
Bosch | 7/05 | 31499J
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