{
  "draft": "draft-allen-sipping-poc-p-answer-state-header-05",
  "doc_id": "RFC4964",
  "title": "The P-Answer-State Header Extension to the Session Initiation Protocol for the Open Mobile Alliance Push to Talk over Cellular",
  "authors": [
    "A. Allen, Ed.",
    "J. Holm",
    "T. Hallin"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "32",
  "pub_status": "INFORMATIONAL",
  "status": "INFORMATIONAL",
  "source": "IETF - NON WORKING GROUP",
  "abstract": "This document describes a private Session Initiation Protocol (SIP) header (P-header) used by the Open Mobile Alliance (OMA) for Push to talk over Cellular (PoC) along with its applicability, which is limited to the OMA PoC application.  The P-Answer-State header is used for indicating the answering mode of the handset, which is particular to the PoC application.  This memo provides information for the Internet community.",
  "pub_date": "September 2007",
  "keywords": [
    "p-header",
    "oma",
    "open mobile alliance",
    "poc"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [
    "RFC8996"
  ],
  "see_also": [],
  "doi": "10.17487/RFC4964",
  "errata_url": null
}