{
  "draft": "draft-ietf-sip-history-info-06",
  "doc_id": "RFC4244",
  "title": "An Extension to the Session Initiation Protocol (SIP) for Request History Information",
  "authors": [
    "M. Barnes, Ed."
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "44",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Session Initiation Protocol",
  "abstract": "This document defines a standard mechanism for capturing the history information associated with a Session Initiation Protocol (SIP) request.  This capability enables many enhanced services by providing the information as to how and why a call arrives at a specific application or user.  This document defines a new optional SIP header, History-Info, for capturing the history information in requests. [STANDARDS-TRACK]",
  "pub_date": "November 2005",
  "keywords": [
    "history-info",
    "retarget",
    "enhanced services",
    "voicemail",
    "automatic call distribution"
  ],
  "obsoletes": [],
  "obsoleted_by": [
    "RFC7044"
  ],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC4244",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4244"
}