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Dialer Operation
13.0 Dialer Operation
The FX-350 Series (models with a D suffix) Fire Control panels are equipped with a built-in
dialer. The dialer provides a means to communicate panel status to the remote central
monitoring station using two dedicated phone lines.
There are many standard protocols for communicating with the central monitoring station, but
the two most commonly used are supported by this panel
• SIA DCS
• Contact ID
13.1 Event Reporting
Events are reported in a special format depending upon the protocol selected.
13.2 Telephone line supervision
The phone lines are supervised for the presence of
• DC voltage
• dial tone, stuttered dial tone and message waiting tone
The supervision is carried out every two minutes; first the DC voltage is supervised and if it is
detected the dial tone is monitored. If the phone lines are equipped with a house phone and
with proper connection if the house phone is in use the supervision is suspended until the
house phone is ON-HOOK again.
If there is an event to be reported in the dialer queue and the house phone is in use the dialer
tries the second line to report the event if that line’s house phone is also in use the dialer
seizes the line thus disconnecting the house phone and reports the event.
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