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Private Session Initiation Protocol Extension for Access Network Information

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Professor David L. Mills
Last updated 2002-06-18
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active.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:


This mechanism is useful in SIP networks that provide layer 2/layer 3 connectivity through different access technologies. This document defines the private SIP extension header P-Access- Network-Info. SIP User Agents may use this header to relay information about the access technology to serving proxies in their home network. The serving proxy may then use this information to optimize services for the UA. For example, a 3GPP terminal uses this header to pass information about the access network such as radio access technology and cell ID to its home service provider.


Professor David L. Mills

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