This unit can be installed with your alarm system and can function as either a primary or back up communication line. The unit communicates using a polled sim card and transmits via the digital GSM Mobile network in your area. Simply put, it works like a mobile phone to call Back to Base or Back to Mobile when activated.
A GSM Unit is ideal for residential or commercial customers who do not have a land line connection to the house, or wish to have a back up communication if the phone line is down, being used or cut.