RFC 3550 RTP July 2003 2.2 Audio and Movie Conference If each audio and movie media are used in a meeting, They can be transmitted as separate RTP sessions. That is, independent RTP and RTCP packets are transmitted for each medium applying two distinctive UDP port pairs and/or multicast addresses. https://keeganisdmw.onesmablog.com/facts-about-net33-rtp-revealed-69983888