... GSM network technology, SMS Control technology, voice technology, wireless communication technology, and intellectualized technologies. touch screen Alarm System, CID communication protocol, ... 5) Can preset up to 5 phone numbers and dial in sequence. 6) Record up to a 10 second greeting for ... phones. (PSTN alarm don’t support SMS) 8) Available in AC\DC with Low-voltage Indicators 9) Learning sensors to ...