... ,VLAN and QoS support 4,NAT Transversal 5,Router Product introduction:The GSM Fixed Wireless Terminal 4 ports Gateway GoIP-4 is a 4 SIM Card Broadband Phone ... Phone Gateway is a new product that connect the GSM and the VOIP seamlessly. To GoIP_4 what is installed on the Mobile ... for Power, Ready, Status, WAN, PC, GSMCall forward from GSM to VoIP and VoIP to GSMDial in mode or dial out mode onlyDial ...