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Section 22. SYSTEM COMMUNICATION
This section provides an explanation of formats this system accommodates for reporting
alarms and other system conditions to the central station. The process of a successful
transmission consists of both the method of communication between the control panel and
the central station receiver and the actual way the information is sent and displayed at the
central station.
Report Code Formats
When the panel calls the central station receiver, it waits to hear a
Òhandshake Ó frequency from the receiver to confirm that the receiver is on-
line and ready to receive its message. Once the panel hears the handshake it
is programmed to listen for, it sends its message. The panel then waits for a
ÒkissoffÓ frequency from the receiver acknowledging that the message was
received and understood.
If the handshake frequency is not given or is not understood by the panel, the
panel will not send its message. Once the handshake frequency is received
and understood by the panel, the panel will send its message. If there is an
error in the transmission (the receiver does not receive a ÒvalidÓ message),
the kissoff frequency will not be given by the central station receiver.
The panel will make a total of eight attempts to the primary telephone
number and eight attempts to the secondary telephone number (if
programmed) to get a valid message through. If the panel is not successful
after its numerous attempts, the keypad will display ÒCommunication
FailureÓ (Alpha keypad) or ÒFCÓ (Fixed-word keypad).
The following chart defines the three sets of (handshake/kissoff) frequencies
that the panel supports and the different formats that can be sent for each.
FORMAT HANDSHAKE TRANSMITS DATA KISSOFF TRANSMIT TIME
Low Speed 1400Hz 1900Hz (10PPS) 1400Hz Under 15 secs.
3+1 (Standard report)
4+1
4+2
Sescoa/Rad 2300Hz 1900Hz (20PPS) 2300Hz Under 10 secs.
3+1 (Standard report)
4+1
4+2
Express 1400Ð2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
4+2
Contact ID 1400Ð2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
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