A Session Description Protocol (SDP) Attribute for Maximum Media Source Count Indication

Document Type Expired Internet-Draft (individual)
Author Jonathan Lennox 
Last updated 2009-07-06
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Real-Time Transport Protocol (RTP) is a multi-point protocol, supporting multiple simultaneous sending sources in an RTP session. However, many existing RTP endpoints cannot usefully receive more than one simultaneous source. This document provides a Session Description Protocol (SDP) attribute that allows endpoints to indicate the maximum number of sources they can usefully receive.


Jonathan Lennox (jonathan@vidyo.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)