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Requirements for indication of features supported by a SIP proxy

Document Type Expired Internet-Draft (sipcore WG)
Authors Christer Holmberg , Ivo Sedlacek
Last updated 2012-06-07 (Latest revision 2011-12-05)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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.)