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Status:

PROPOSED STANDARD

Authors:

R. Jesske
L. Liess

Stream:

IETF

Source:

NON WORKING GROUP

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DOI:  https://doi.org/10.17487/RFC6432

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Abstract

Although the use of the SIP (Session Initiation Protocol) Reasonheader field in responses is considered in general in RFC 3326, itsuse is not specified for any particular response code. Nonetheless,existing deployments have been using Reason header fields to carryfailure-related Q.850 cause codes in SIP responses to INVITE requeststhat have been gatewayed to Public Switched Telephone Network (PSTN)systems. This document normatively describes the use of the Reasonheader field in carrying Q.850 cause codes in SIP responses. [STANDARDS-TRACK]

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.