https://app.knowbase.one/vault/rfc/docid/415
RFC9143: Negotiating Media Multiplexing Using the Session Description Protocol (SDP)
Internet Engineering Task Force (IETF) C. Holmberg Request for Comments: 9143 Ericsson Obsoletes: 8843 H. Alvestrand Updates: 3264, 5888, 7941 Google Cat...