The Reason Header Field for the Session Initiation Protocol (SIP)

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Internet Engineering Task Force

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Active

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Electronic (PDF)

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10 minutes

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W/D S/S BY IETF RFC 9366

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.

Edition :	02
Number of Pages :	8
Published :	12/01/2002

IETF RFC 3326 PDF

The Reason Header Field for the Session Initiation Protocol (SIP)

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