Someone may be interested in such useful innovation.
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Edited November 1, 201312 yr by jameswilson

Many modern alarms controls can do this, Agility, Lightsys, Visonic etc. if your talking dedicated activating over GSM, it's been done for a long time, google 'GSM Eagle'.

http://electricimp.com/

 

This guy used to run a computer shop in crappy Wells (comically lame setting of 'Hot Fuzz') and ended up

working for Apple on the iPhone. I remember he sold me a 1200 baud modem once. Obv. done ok for himself

since!