
22–1
SECTION 22
System Communication
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In This Section
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Panel Communication with Central Station
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Report Code Formats
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Panel Communication with Central Station
This system accommodates several formats 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.
When the panel calls the Central Station receiver, it waits to hear a “handshake” 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 “kissoff”
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 “valid” 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 COMM. FAILURE (on alpha
keypads) or FC (on fixed-word keypads).
Report Code Formats
The following chart indicates the characteristics of the various reporting formats that the this control
panel supports:
FORMAT HANDSHAKE TRANSMITS KISSOFF TRANSMIT
TIME DATA
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 4+2 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
Contact ID 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
The following describes each format in greater detail.
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