Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3rd-Generation Partnership Project (3GPP)

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Keith Drage  , Christer Holmberg  , Roland Jesske 
Last updated 2012-10-04 (latest revision 2012-04-02)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a set of private Session Initiation Protocol (SIP) header fields (P-headers) used by the 3rd-Generation Partnership Project (3GPP), along with their applicability, which is limited to particular environments. The P-header fields are for a variety of purposes within the networks that the partners use, including charging and information about the networks a call traverses.


Keith Drage (
Christer Holmberg (
Roland Jesske (

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