{
  "number": 4244,
  "title": "An Extension to the Session Initiation Protocol (SIP) for Request History Information",
  "authors": [
    "M. Barnes, Ed."
  ],
  "published": "2005-11",
  "status": "Proposed Standard",
  "stream": "IETF",
  "area": "rai",
  "working_group": "sip",
  "pages": 44,
  "formats": [
    "TXT",
    "HTML"
  ],
  "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]",
  "keywords": [
    "history-info",
    "retarget",
    "enhanced services",
    "voicemail",
    "automatic call distribution"
  ],
  "draft": "draft-ietf-sip-history-info-06",
  "doi": "10.17487/RFC4244",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4244",
  "obsoleted_by": [
    "RFC7044"
  ],
  "urls": {
    "html": "https://rfc.dk/rfc4244/",
    "text": "https://rfc.dk/rfc4244.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc4244",
    "datatracker": "https://datatracker.ietf.org/doc/rfc4244/"
  },
  "text_modified": "2005-11-21T18:52:42Z"
}