1,one channel GSM VoIP gateway 2,support ITU H.323 V4 and IETF SIP ... 5,NAT traversal. Product Introduction:The GSM Fixed Wireless Terminal 1 ports Gateway GoIP-1 is a 1 SIM Card ... 1 SIM Card Broadband Phone Gateway is a new product that connect the GSM and the VOIP seamlessly. To GoIP-1 what ... , Ready, Status, WAN, PC, GSMCall forward from GSM to VoIP and VoIP to GSMDial in mode or dial out mode onlyDial ...