... ,VoIP phone 2,Build in GSM/CDMA Module 3,Point-to-Point Mode and Group Transmit Mode 4,Link up radio RoIP Gateway,VoIP phone ... Description:What is a Cross-Network Gateway?It enables voice communications among the Radio, VoIP, GSM, and Public ... enables direct access to the radio networks connected via any phone in the existing telephone networks (PSTN and Cellular). This ...