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Hybertone GSM VoIP Gateway GOIP-16 with External Antenna 16 GSM Channels Quad band VLAN/Qos

16 Ports VoIP GSM Gateway GoIP-16 for call termination (VoIP to GSM) and origination (GSM to VoIP). It is SIP & H. 323 based and compatible with Asterisk, Trixbox, 3CX, SIP Proxy Server, VoipBuster. It can enable to make 1/4/8/16 calls simultaneously from IP phones to GSM networks and GSM networks to IP phone.