as the audio codecs (G.711, G.723.1, G.728, etc.) and video codecs (H.261, H.263) that compress and decompress media streams. Media streams are transported on RTP/RTCP. RTP carries the actual media and RTCP carries status and control information. The signalling is transported reliably over TCP. The following protocols deal with signalling: RAS manages registration, admission, status. Q.931 manages call setup and termination. H.245 negotiates channel usage and capabilities. H.235 security and authentication. Wills Point dial up connection, Wills Point, TX up connection dial Wills PointWills Point up connection, dial Texas, Wills Point dial up connection
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