... of main panel by learning code 2,Fixed time arm/ GSM wireless and wired alarm panel 1. ... adopts SMS data transmission and voice platform of GSM network to send control command and receive alarm ... time, date and the status of arm, disarm, GSM signal, power, alarm, etc. The specific functions ... centre15. Check host's status by SMS Specificationsa) GSM frequency:900/1800/850/1900MHz (Optional) b) ...