There are 4 main methods of transmitting alarm signals back to a monitoring centre:
1. Long Range Radio Monitoring
With radio monitoring, should the alarm activate a radio transmitter fitted at the protected premises will send a signal back to a monitoring via a private radio network.
At AlarmControl24 we have our own private Long Range Radio Network which is licensed by COMREG and does not share bandwidth with any other radio providers.
The ATR100 Radio transmitter is the only EN-50136 certified radio transmitter in Ireland. Our radio network is totally secure and is used for alarm transmission only.
Most recently our radio monitoring solution has been awarded “Innovation in Security 2014” by the Irish Security Industry Association (ISIA).
2. Telephone Line
A “digital communicator” or “digi” is connected to the phone line. When the alarm activates it sends a signal to the alarm receiving centre (ARC). We monitor many thousand of these type of connections.
3. GSM/GPRS Dual Communicator Unit
The GSM and the GPRS element of this communicator both transmit via the cellular network back to the ARC. This is a popular form of alarm transmission as the secondary path is useful should the primary path fail.
4. GSM Digital Communicator
A GSM Dialler uses the cellular network to transmit its signals to the ARC. This is a single path reporting back to the ARC.
An Garda Síochána Policy on Monitored Intruder Alarms
In 2008, in an effort to reduce the number of false alarms that they were responding to, An Garda Síochána introduced a Garda Alarm Policy to clarify which type of alarm activations they will respond to.
The policy is clear – only verified alarms will qualify for Garda cover. A verified alarm is one in which two sequential detection devices have activated in a premises.
For example, an alarm could be classified as a verified alarm if the alarm panel sends information to an ARC showing two sequential devices activating (an example would be where it is shown that someone has triggered the front door window followed by a PIR beam in the hallway).
In a situation where only a single zone activates (e.g. the front door window only) the Garda will not attend the premises (as it is more than likely a false alarm).
What is the relevance of this for alarm monitoring purposes?
This policy means that a signal fault (e.g. dropped GSM/GPRS signal from an alarm transmission system, or a dropped telephone line ) or a single zone activation (e.g. a front window only activating) will not qualify for Garda response.
In a situation where GSM/GPRS jammers are used at a premises the only indicator within the Alarm Receiving Centre (ARC) of an issue will be missed polls or basically no network coverage. No signal from any of the detection devices of any kind inside the premises will be received by the ARC as the cellular network used to send these signals will be blocked.