Anti GSM Blocking
What is a GSM Blocker?
A GSM Blocker is a small electronic device that can effectively block any radio signal in the local area where it is activated. There are a wide variety of blockers available with different abilities to block wider radio frequency ranges over wider distances.
It is important to note that any device which transmits via a radio frequency can be blocked.
How is it used?
An intruder will typically position a blocker beside or on the roof of a premises which they have targeted. When the device is switched on, the intruder will cut the PSTN landline. When the intruder breaks into the building the intruder alarm panel will try to alert the monitoring company by the phone line which is cut, it will then send the signal via the GSM back-up device. However, that signal goes nowhere. It is also important to note that the intruder alarm panel and the GSM back-up unit do not know that the alarm event has not been sent to the monitoring centre. The intruders can spend as long as they like in the premises without anybody knowing until the next morning when you or a member of staff first arrives to work.
What can Appin Security do for you?
Appin Security has the solution to this growing problem. The CSL ‘Dualcom’ device is currently protecting 112,000 premises from GSM Blockers. As a PSA licensed installer we can install one of these units for you in minutes. The unit operates via a private GPRS network which is exclusively dedicated to the monitoring of your intruder alarm connection. The device communicates with the Monitoring station through three different communication paths: GPRS, GSM, and PSTN. The Monitoring station
will test the CSL ‘Dualcom’ device in your premises every three minutes.
This test will fully check the communication path between your intruder alarm and the Monitoring station. If the GPRS signal has disappeared, the unit will automatically switch to try GSM and then PSTN. Even if the local cell tower has gone the unit will automatically switch to another network ie. Vodafone, O2, or Meteor. This happens in a matter of milliseconds. If there is a signal path failure, we will know at the Monitoring station. If there is a Total path failure, we will know at the Monitoring station.
Remember, this full diagnostic test happens every three minutes of every hour, every day for 365 days a year. If your signal is being blocked, one of our controllers will be calling you to let you know.
Contact us today for more information
Office: 045909615
Mobile:0863825920 (Brian)
