There are essentially 4 different types of Intruder Alarm communication systems on the market. These units provide the signal from your Intruder detection system to the alarm receiving centre (ARC) in the event of an alarm activation.
1. Digital communication card (via telephone line)
2. GSM / GPRS (Dual communicator unit)
3. GSM Digital communicator
4. Long range telemetry (mesh network)
|1. Digital Communication card
Intruder alarm monitoring via a “Digi card” connected from the alarm panel to the telephone line is the most common type of communication. Essentially a “digital communication card” is connected to the phone line. When the Alarm is activated an alarm signal is sent to the alarm receiving centre from the alarm control panel.
|2. GSM / GPRS
A GSM / GPRS dialer is a relatively new arrival on the market in Ireland. The GSM element of this unit transmits over the mobile / cellular network. The GPRS element of this device transmits high speed data to the alarm receiving centre also on the GSM network.
|3. GSM Digital communicator
A GSM dialler uses the cellular network to transmit its signal to the alarm receiving centre. It is designed to give more protection to high risk properties, such as Service stations and Jewellery stores etc, so that in the risk of an alarm activation, an alarm receiving centre will still receive signals from both normal digital communicator (via the phone line) and the GSM dialler via the cellular network.
|4. Long Range Telemetry
This consists of a nationwide network of repeaters that receive signals from independent radio transmitters that are located on protected properties around the country. These repeaters then bounce the signal back to the receivers in the alarm monitoring centre (ARC). This radio network is totally secure against jammers and is regarded as one of the most reliable forms of communication for security systems.