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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.
Communication Overview
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.
3
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 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 “FC.” If the secondary number is a
pager, “FC” displays after the first 8 attempts to the primary number.
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 seconds
3+1 (Standard report)
4+1
4+2
Sescoa/Rad 2300Hz 1900Hz (20PPS) 2300Hz Under 10 seconds
3+1 (Standard report)
4+1
4+2
Express 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 seconds
4+2
Contact ID® 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 seconds
Report Code Formats
3+1 and 4+1 Standard Formats Comprise a 3- (or 4-) digit subscriber number and a single digit report
code (e.g. alarm, trouble, restore, open, close, etc).
3+1 and 4+1 Expanded Formats Comprise a 3- (or 4-) digit subscriber number, and a 2-digit report
code. The first digit is displayed on the first line, followed by a second
line where the first digit is repeated 3 (or 4) times and followed by the
second digit. This is the “expanded” digit.
4+2 Format Comprises a 4-digit subscriber number and 2-digit report code.
ADEMCO Contact ID® Comprises a 4-digit subscriber number, 1-digit event qualifier
Reporting Format (“new” or “restore”), 3-digit event code, and 3-digit zone number, user
number, or system status number (see the following page).
The following table shows the message formats for 3+1, 4+1 and 4+2 reports, where:
SSS or SSSS = Subscriber ID C = Close Code (1st Digit)
A = Alarm Code (1st digit) U = User Number (in hex)
Z = Typically Zone Number* (2nd digit) Gg = Test Code (1st & 2nd digits)
Tt = Trouble Code (1st & 2nd digits) R = Alarm Restore Code
Bb = Bypass Code (1st & 2nd digits) R
T
t = Trouble Restore Code (1st & 2nd digits)
EA
C =
AC Loss Code (1st & 2nd digits) R
B
b = Bypass Restore Code (1st & 2nd digits)
LL
B =
Low Battery Code (1st & 2nd digits) R
A
A
C
=
AC Restore Code (1st & 2nd digits)
O = Open Code (1st Digit) R
L
L
B =
Battery Restore Code (1st & 2nd digits)
*Zone numbers for: [
*
] & [#], or [B] = 99; [1] + [
*
], or [A] = 95; [3] + [#], or [C] = 96; Duress = 92