Requirements for indication of features supported by a SIP proxy

Document Type Expired Internet-Draft (sipcore WG)
Last updated 2012-06-07 (latest revision 2011-12-05)
Stream IETF
Intended RFC status (None)
Expired & archived
plain text pdf html bibtex
Stream WG state WG Document (wg milestone: May 2012 - WGLC on requirements... )
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Session Initiation Protocol (SIP) "Caller Preferences" extension defined in RFC 3840 provides a mechanism that allows a SIP message to convey information relating to the originator's supported features/ capabilities. This document defines requirements for a mechanism that would allow SIP proxies to convey information relating to the proxy's supported features/capabilities.


Christer Holmberg (
Ivo Sedlacek (

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