VJ-16GV is a 16 channels VoIP GSM Gateway for call termination (VoIP to GSM and GSM to VoIP). It is SIP based and compatible with Asterisk. It can enable to make 16 Calles simultaneously from IP phone to GSM network and GSM network to IP phone. Main Features: · Support H.323, SIP (RFC3261) compliance · Network frequency: Quad band 850/900/1800/1900Mhz · Codec:G.711u-Law ,G.711a-Law,G.723(5.3k),G. ...