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FireNET FN-DAC Digital Alarm Communicator I & O Manual - v 1.0
NOTE
: Ground Start phone lines must not be used.
NOTE
: Call Forwarding must not be used.
Test Report: The test report is sent using alternating phone lines once every 24 hours.
All attempts to communicate the test report will be made on one phone line, even if
that line is not working. The next test report is sent using the other phone line. This
complies with UL and NFPA requirements for digital alarm communicators.
NOTE
: If the central station only receives every other test report (i.e. every other day),
this is an indication that the communicator is unable to report using one of the phone
lines. Investigate and correct the cause of this condition immediately.
2.5.2 Phone Line Supervision
The FN-DAC supervises both telephone lines for the presence of normal line voltage.
Each line is checked every 10 seconds. If trouble with a phone line is detected, the
FireNET display will indicate the trouble condition. The phone line failure can be
communicated to the monitoring station using the other phone line, unless it has also
failed.
Normal phone line voltage is approximately 48 VDC. The FN-DAC will detect a trouble
condition when the phone line voltage falls below 4 VDC.
NOTE
: Since the FN-DAC samples voltage to test the telephone lines, it cannot
recognize a non-working phone line that has normal voltage present.
NOTE
: The FN-DAC does not supervise the telephone lines while it is communicating.
2.5.3 Report Groups
The FN-DAC has five report groups that can be selected to maximize the reporting
options. Each group includes specific types of events that will be reported. The report
groups are selected by account, with account 2 and 4 also having a selection for
backup reporting. The report groups and events associated with them are shown
below:
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