1.2.1 Normative References
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[MS-RTPME] Microsoft Corporation, "Real-Time Transport Protocol (RTP/RTCP): Microsoft Extensions".
[MS-SDP] Microsoft Corporation, "Session Description Protocol (SDP) Extensions".
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997, http://www.rfc-editor.org/rfc/rfc2119.txt
[RFC2198] Perkins, C., "RTP Payload for Redundant Audio Data", RFC 2198, September 1997, http://www.rfc-editor.org/rfc/rfc2198.txt
[RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and Jacobson, V., "RTP: A Transport Protocol for Real-Time Applications", STD 64, RFC 3550, July 2003, http://www.ietf.org/rfc/rfc3550.txt