Digital Communications (Digicom) - With this type of intruder alarm system, alarm signals from the intruder alarm system are monitored by an Alarm Receiving Centre, but the telephone line is not monitored, so if it is cut no signal is sent, i.e. if the telephone cable is accessible the intruder alarm system can be easily overcome albeit the sounders will operate.
The system can usually monitor up to eight “channels”, covering for example:
1. Fire alarms
2. Panic alarms
3. Intruder alarms
4. Setting and unsetting the alarms
5. Alarm abort, to cancel a signal for response to the monitoring centre
6. A second signal for a confirmed activation, resulting in the police and keyholder being called.
7. Mains failure
8. Test signal which can be set up to send a signal hourly to the monitoring centre to confirm that the system is active.
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