A new Request for Comments is now available in online RFC libraries.
RFC 3326
Title: The Reason Header Field for the Session Initiation
Protocol (SIP)
Author(s): H. Schulzrinne, D. Oran, G. Camarillo
Status: Standards Track
Date: December 2002
Mailbox: schulzrinne@cs.columbia.edu, oran@cisco.com,
Gonzalo.Camarillo@ericsson.com
Pages: 8
Characters: 15695
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-sip-reason-01.txt
URL: ftp://ftp.rfc-editor.org/in-notes/rfc3326.txt
For creating services, it is often useful to know why a Session
Initiation Protocol (SIP) request was issued. This document defines
a header field, Reason, that provides this information. The Reason
header field is also intended to be used to encapsulate a final
status code in a provisional response. This functionality is needed
to resolve the "Heterogeneous Error Response Forking Problem", or
HERFP.
This document is a product of the Session Initiation Protocol and the
Session Initiation Proposal Investigation Working Groups of the IETF.
This is now a Proposed Standard Protocol.
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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