... the person who receive the alarm message by TTS intelligent digital voice alert system where ,which zone and what alarm event happend, so that ... /SSG-3G/SSG-GPRS/CONTACT ID/4+2/SSG-732 9 Support various access mode include 1 signaling , 7 signaling , common ... several days to repair the whole system by himself. By far, most of CMS system suppliers still use IPC with standalone version , these ...