{"draft":"draft-ietf-mmusic-sdp4nat-05","doc_id":"RFC3605","title":" Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP) ","authors":["C. Huitema"],"format":["ASCII","HTML"],"page_count":"8","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Multiparty Multimedia Session Control RAI","abstract":" The Session Description Protocol (SDP) is used to describe the parameters of media streams used in multimedia sessions.  When a session requires multiple ports, SDP assumes that these ports have consecutive numbers.  However, when the session crosses a network address translation device that also uses port mapping, the ordering of ports can be destroyed by the translation.  To handle this, we propose an extension attribute to SDP. ","pub_date":"September 2003","keywords":["[--------|p]","nat","network access translation","port mapping"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC3605","errata_url":"https:\/\/www.rfc-editor.org\/errata\/rfc3605"}