Voice gateway 3 SIP accounts and 1 PSTN line 3-way ... WAN, 1 LAN 2012 New GT-G303B 1 FXO Port Voice Gatway Performance and FeaturesSIP v1 (RFC2543), v2(RFC3261)Support Route ... .729,G.711 A-Law,μ-Law audio codec algorithm Dynamic voice detection Echo cancellation Comfort noise generation Tone generation and Local ... .init( { 'aImgSrc': aBigImageSrc } ); } )(); 2012 New GT-G303B 1 FXO Port Voice Gatway