Home automation using GSM for security?

A GSM remote control is a wireless remote control switch that connects to the GSM cell phone network.

It is activated by calling its cell phone number, it will reject the call without answering and switch on the device connected to it, because it rejects the call there are no call costs incurred when dialling the unit

It can be used for example to open automatic gates, control central heating, '''engine pre-heaters, aviation engine heaters, '''irrigation systems, water well pumps, pumping stations, control machinery using your cell phone from anywhere in the world

A GSM remote control along with more details can be found at http://www.gsm-auto.com

''''''