Traditional Analog CID Monitoring

Contact ID has become one of the most popular of these protocols and is supported by most modern alarm systems. Contact ID uses DTMF tones to communicate alarms in the following format:

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/input number (015)

   8 = The checksum

The entire message can be looked at like this: