{
  "number": 7433,
  "title": "A Mechanism for Transporting User-to-User Call Control Information in SIP",
  "authors": [
    "A. Johnston",
    "J. Rafferty"
  ],
  "published": "2015-01",
  "status": "Proposed Standard",
  "stream": "IETF",
  "area": "rai",
  "working_group": "cuss",
  "pages": 19,
  "formats": [
    "TXT",
    "HTML"
  ],
  "abstract": "There is a class of applications that benefit from using SIP to exchange User-to-User Information (UUI) data during session establishment. This information, known as call control UUI data, is a small piece of data inserted by an application initiating the session and utilized by an application accepting the session. The syntax and semantics for the UUI data used by a specific application are defined by a UUI package. This UUI data is opaque to SIP and its function is unrelated to any basic SIP function. This document defines a new SIP header field, User-to-User, to transport UUI data, along with an extension mechanism.",
  "keywords": [
    "UUI",
    "Package",
    "Content",
    "Encoding",
    "Media"
  ],
  "draft": "draft-ietf-cuss-sip-uui-17",
  "doi": "10.17487/RFC7433",
  "urls": {
    "html": "https://rfc.dk/rfc7433/",
    "text": "https://rfc.dk/rfc7433.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc7433",
    "datatracker": "https://datatracker.ietf.org/doc/rfc7433/"
  },
  "text_modified": "2015-01-23T04:34:47Z"
}