A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Session Initiation Protocol Working Group of
the IETF.
Title : Requesting Answering Modes for the Session Initiation
Protocol (SIP)
Author(s) : D. Willis, A. Allen
Filename : draft-ietf-sip-answermode-04.txt
Pages : 25
Date : 2007-6-12
This document defines extends SIP with two header fields and
associated option tags that can be used in INVITE requests to convey
the requester's preference for user-interface handling related to
answering of that request. The first header, "Answer-Mode",
expresses a preference as to whether the target node's user interface
waits for user input before accepting the request or instead accepts
the request without waiting on user input. The second header, "Priv-
Answer-Mode" is similar to the first, except that it requests
administrative-level access and has consequent additional
authentication and authorization requirements. These behaviors have
applicability to applications such as Push-to-Talk and to diagnostics
like loop-back. Usage of each header field in a response to indicate
how the request was handled is also defined.
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