The Session Initiation Protocol "Join" Header
RFC 3911, “The Session Initiation Protocol "Join" Header”, is a Proposed Standard document published in October 2004 by R. Mahy, D. Petrie. The canonical text is published by the RFC Editor.
Abstract
This document defines a new header for use with SIP multi-party applications and call control. The Join header is used to logically join an existing SIP dialog with a new SIP dialog. This primitive can be used to enable a variety of features, for example: "Barge-In", answering-machine-style "Message Screening" and "Call Center Monitoring". Note that definition of these example features is non-normative. [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 3911 is hosted at rfc-editor.org. Available in TXT,HTML.
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