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

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Document Type Expired Internet-Draft (individual)
Last updated 2013-09-16 (latest revision 2013-03-15)
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This Internet-Draft is no longer active.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.


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