Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the Open Mobile Alliance (OMA) Push to talk over Cellular (PoC)

Document Type Replaced Internet-Draft (individual)
Last updated 2005-06-29 (latest revision 2005-02-08)
Replaced by draft-allen-sipping-poc-p-answer-state-header
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Replaced by draft-allen-sipping-poc-p-answer-state-header
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This Internet-Draft is no longer active.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) headers (P-headers) used by the Open Mobile Alliance (OMA),For Push to talk over Cellular (PoC) along with their applicability, which is limited to the OMA PoC application. The P-headers are used for requesting and indicating the alerting mode of the handset which is particular to the PoC application.


Andrew Allen (

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