20–1

SECTION 20

System Communication
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In This Section
♦Panel Communication with Central Station
♦ Report Code Formats
♦ System Communication Programming
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Panel Communication with Central Station

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 display ed at the
central station.

Report Code Formats

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 se nds its me ssage. 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 understoo d by the pan el, the pane l 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 p rogrammed) to get a valid message through.
If the panel is not successful after its numerous attempts, the keypad w ill display
“Communication Failure” (on an alpha keypad) or “FC” (on a 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
TIME HANDSHAKE TRANSMITS DATA KISSOFF TRANSMIT TIME
Low Speed
3+1
4+1
4+2
1400Hz 1900Hz (10PPS) 1400Hz Under 15 secs.
(Standard report)
Sescoa/Rad
3+1
4+1
4+2
2300Hz 1800Hz (20PPS) 2300Hz Under 10 secs.
(Standard report)
4+2 Express 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
Contact ID 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.