Session Initiation Protocol (SIP) Cause URI parameter for Service Number translation

The information below is for an old version of the document
Document Type None Internet-Draft (individual)
Last updated 2015-07-21
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Additional URLs
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Unknown state
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This Internet-Draft is no longer active.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


[RFC4458] defines a "cause" URI parameter as having predefined values for Redirecting reasons as a mapping from ITU-T Q.732.2-5 Redirecting Reasons. The "cause" URI parameter is to be used in SIP or SIPs URI. In particular, it may appear in the Request-URI of a SIP request. This specification creates a new predefined value for the "cause" URI parameter for cases when the retargeting is due to specific service action leading to a called service access number translation. This document updates [RFC4458].


Marianne Mohali (

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