... support: English and Chinese Supported Standards•ITU: H.323 V4, H.225, H.235, H.245, H.450 •RFC 1889 - RTP/RTCP •RFC ... Session Initiation Protocol Call Control-Transfer •Codec: G.711 (A/µ law), G.729A/B, G.723.1 •DTMF: RFC 2833, In-band ... cableBox Size:35.5*21*6.5cm(L*W*H)G.W.:0.85kgCarton Dimension: 43*34*39cm(L*W ... *H)G.W.:9.5kg GSM/VoIP GoIP 400 Gateway terminal ...