The Early Session Disposition Type for the Session Initiation Protocol
RFC 3959, “The Early Session Disposition Type for the Session Initiation Protocol”, is a Proposed Standard document published in December 2004 by G. Camarillo. The canonical text is published by the RFC Editor.
Abstract
This document defines a new disposition type (early-session) for the Content-Disposition header field in the Session Initiation Protocol (SIP). The treatment of "early-session" bodies is similar to the treatment of "session" bodies. That is, they follow the offer/answer model. Their only difference is that session descriptions whose disposition type is "early-session" are used to establish early media sessions within early dialogs, as opposed to regular sessions within regular dialogs. [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 3959 is hosted at rfc-editor.org. Available in TXT,HTML.
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