RTP

RTP (Real-time Transport Protocol), used in Voice-over-IP connections.

RTP opens two ports for communication. One for the media stream (an even port number) and one for control (QoS feedback and media control) - RTCP. The port numbers are not hard defined, it depends very much upon the application.


 * 1)  RTP (Real-time Transport Protocol)
 * 2) RTCP (Real-time Control Protocol)
 * 3) RTCP XR (Real-time Control Protocol Extended Reports)


 * http://www.voip-info.org/wiki-RTP

also see: ZRTP (encrypted RTP),Zfone,VoIP