A Session Initiation Protocol Media Feature Tag for MIME Application Subtypes
RFC 5688, “A Session Initiation Protocol Media Feature Tag for MIME Application Subtypes”, is a Proposed Standard document published in January 2010 by J. Rosenberg. The canonical text is published by the RFC Editor.
Abstract
The caller preferences specification for the Session Initiation Protocol (SIP) allows a caller to express preferences that the call be routed to a User Agent (UA) with particular capabilities. Similarly, a specification exists to allow a UA to indicate its capabilities in a registration. Amongst those capabilities are the type of media streams the agent supports, described as top-level MIME types. The 'application' MIME type is used to describe a broad range of stream types, and it provides insufficient granularity as a capability. This specification allows a UA to indicate which application subtypes the agent supports. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 5688 is hosted at rfc-editor.org. Available in TXT,HTML.
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