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Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for support of Indication of Dialog Type

Document type: Expired Internet-Draft (individual)
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Last updated: 2013-02-17 (latest revision 2012-08-16)
Intended RFC status: Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


This document describes private extensions to the Session Initiation Protocol (SIP) that enable a SIP entity to indicate in the INVITE message the exact purpose of the INVITE transaction, e.g. media negotiation, session refresh or creation of an pure signaling dialog.


Yue Song <>
Yi Jiang <>

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