Specifications

Level One: Protege GX Installer Study Guide | August 2013 347
Contact ID uses DTMF tones to communicate alarms in the following format:
1234 18 1131 01 015 8
Account Type Event Area Zone Chksum
where:
1234 = The account number (1234)
18 = The message type used to identify the message as Contact ID
1131 = The event qualifier (1) for a new event, followed by the event code for perimeter burglary
01 = The partition or area number (1)
015 = The zone number (015)
8 = The checksum
The entire message can be looked at like this:
0800 123 456 123 18 1131 01 015 8
Phone Number Contact ID String
The panel dials the pre-programmed phone number then waits for the handshake tone. When it receives the
handshake tone, it transmits the CID string then waits for the kiss-off tone from the receiver.
The software running at the central monitoring station then picks these alarm messages up from the receiver,
looks up the account and zone names on its database and displays the alarm to the operator.
Alarm Monitoring Software
Contact ID Alarm Processing
Phone Line
Receiver
Server
Workstation Monitoring Operator
Database
As Contact ID only sends a bunch of numbers representing account, area and zone, the monitoring operator
relies on the database inside the monitoring software being accurate. The information they receive is only ever
as good as that provided by the technician during installation.