HTTP Fallback for RTP Media Streams

Document Type Expired Internet-Draft (individual)
Last updated 2013-02-08 (latest revision 2012-08-07)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Almost all VoIP endpoints, especially SIP and RTCWEB ones, make use of RTP to tranport media frames in real-time and communicate with each other. Since RTP uses UDP, the presence of network elements that filter UDP packets and/or only allow some protocols like SMTP or HTTP to pass through would make such a communication very hard to accomplish, if not impossible. This draft describes a way to implement an HTTP Fallback for RTP media streams, that is, a way to effectively encapsulate RTP packets in HTTP messages in order to traverse proxies and firewalls.


Lorenzo Miniero (

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