A device that works with auto-dial intruder alarm system to extend the communication mode to GSM phone

Working frequency: GSM900MHz/1800MHz

Easy installation: only insert a SIM card of GSM network then it can realize the dialing through two networks General GSM wireless communicator is the effective backup or substitute of traditional telephone line, which exerts its efficacy by connecting the alarm controller and GSM network. It provides protect function in case the telephone line is cut off. When alarming, the communicator will inspect its connection with the PSTN telephone line, if fault comes out, it will connect the GSM network and send alarm signal to the police center.