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DS9400 Series | Release Notes for Firmware V2.07 | 9.0 Known Issues with Firmware Version 2.07
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Bosch Security Systems | 8/06 | 36925V 7
• Temporarily swap lines 1 and 2 on the
control panel and see if the problem
indication moves to the control panel’s other
phone line channel, in which case the phone
line is causing the problem rather than the
line monitor.
5. Confirm that the fault message is “phone fault”
and not “Comm fault”.
• “Comm fault” is often caused by failing to
program a phone number or account
number for phone number 2, while routing
reports to “line 1, backup line 2”.
• If only one phone number is available for
reporting, set report steering for all events to
“phone 1 only”.
• “Comm fault” may also be caused if one of
the phone lines has Telco battery voltage,
but will not complete a call. Make test calls
to the receiver(s) on both phone lines,
listening for the receiver ACK tone
6. Make sure that two phone lines are available.
• In accordance with NFPA requirements, the
auto-test report is sent on a different phone
line each time it is sent. If only one phone
line is connected to the control panel, a
“Comm fault” will be generated on every
other test call.