{
  "number": 8119,
  "title": "SIP \"cause\" URI Parameter for Service Number Translation",
  "authors": [
    "M. Mohali",
    "M. Barnes"
  ],
  "published": "2017-03",
  "status": "Informational",
  "stream": "IETF",
  "pages": 12,
  "formats": [
    "TXT",
    "HTML"
  ],
  "abstract": "RFC 4458 (regarding SIP URIs for applications) defines a \"cause\" URI parameter, which may appear in the Request-URI of a SIP request, that is used to indicate a reason why the request arrived to the User Agent Server (UAS) receiving the message. This document updates RFC 4458 by creating a new predefined value for the \"cause\" URI parameter to cover service number translation for cases of retargeting due to specific service action leading to the translation of a called service access number. This document also provides guidance, which was missing in RFC 4458, for using the \"cause\" URI parameter within the History-Info header field, since this use is mandatory in some IP networks' implementations.",
  "keywords": [
    "Cause"
  ],
  "draft": "draft-mohali-dispatch-cause-for-service-number-14",
  "doi": "10.17487/RFC8119",
  "updates": [
    "RFC4458"
  ],
  "urls": {
    "html": "https://rfc.dk/rfc8119/",
    "text": "https://rfc.dk/rfc8119.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc8119",
    "datatracker": "https://datatracker.ietf.org/doc/rfc8119/"
  },
  "text_modified": "2017-03-16T00:05:11.142033171Z"
}