A new Request for Comments is now available in online RFC libraries.
RFC 6432
Title: Carrying Q.850 Codes in Reason
Header Fields in SIP (Session Initiation
Protocol) Responses
Author: R. Jesske, L. Liess
Status: Standards Track
Stream: IETF
Date: November 2011
Mailbox: r.jesske@telekom.de,
L.Liess@telekom.de
Pages: 4
Characters: 7487
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-jesske-dispatch-update3326-reason-responses-05.txt
URL: http://www.rfc-editor.org/rfc/rfc6432.txt
Although the use of the SIP (Session Initiation Protocol) Reason
header field in responses is considered in general in RFC 3326, its
use is not specified for any particular response code. Nonetheless,
existing deployments have been using Reason header fields to carry
failure-related Q.850 cause codes in SIP responses to INVITE requests
that have been gatewayed to Public Switched Telephone Network (PSTN)
systems. This document normatively describes the use of the Reason
header field in carrying Q.850 cause codes in SIP responses.
[STANDARDS-TRACK]
This is now a Proposed Standard Protocol.
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protocol for the Internet community,and requests discussion and suggestions
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