RFC8433 · A Simpler Method for Resolving Alert-Info URNs

{
  "id": "RFC8433",
  "number": 8433,
  "title_en": "A Simpler Method for Resolving Alert-Info URNs",
  "title_ru": "",
  "summary_ru": "",
  "purpose_ru": "",
  "use_ru": "",
  "full_translation_path": "",
  "full_translation_checked_at": "",
  "full_translation_source_sha256": "",
  "architect_note_ru": "",
  "topics_ru": [],
  "translation_state": "not_prepared",
  "verification_level": "not_prepared",
  "verification_level_ru": "Русская выжимка не подготовлена",
  "verification_note_ru": "",
  "abstract_en": "The \"alert\" namespace of Uniform Resource Names (URNs) can be used in the Alert-Info header field of Session Initiation Protocol (SIP) requests and responses to inform a voice over IP (VoIP) telephone (user agent) of the characteristics of the call that the user agent has originated or terminated. The user agent must resolve the URNs into a signal; that is, it must select the best available signal to present to its user to indicate the characteristics of the call. RFC 7462 describes a non-normative algorithm for signal selection. This document describes a more efficient alternative algorithm: a user agent's designer can, based on the user agent's signals and their meanings, construct a finite state machine (FSM) to process the URNs to select a signal in a way that obeys the restrictions given in the definition of the \"alert\" URN namespace.",
  "authors": [
    "D. Worley"
  ],
  "organizations": [],
  "publication_date": "2018-08-01",
  "current_status": "INFORMATIONAL",
  "current_status_ru": "Информационный",
  "publication_status": "INFORMATIONAL",
  "publication_status_ru": "Информационный",
  "lifecycle": "informational",
  "lifecycle_ru": "Справочный",
  "stream": "INDEPENDENT",
  "stream_ru": "Независимый поток",
  "area": "",
  "area_ru": "",
  "working_group": "",
  "source_draft": "draft-worley-alert-info-fsm-10",
  "page_count": 45,
  "doi": "10.17487/RFC8433",
  "keywords": [
    "Alert-Info",
    "audio signals",
    "call signaling",
    "call transfer",
    "resolution",
    "signaling",
    "signals",
    "SIP",
    "URN",
    "visual signals"
  ],
  "formats": [
    "TXT",
    "HTML"
  ],
  "relations": {
    "obsoletes": [],
    "obsoleted_by": [],
    "updates": [],
    "updated_by": [],
    "is_also": [],
    "see_also": []
  },
  "links": {
    "info": "https://www.rfc-editor.org/info/rfc8433/",
    "html": "https://www.rfc-editor.org/rfc/rfc8433.html",
    "txt": "https://www.rfc-editor.org/rfc/rfc8433.txt",
    "datatracker": "https://datatracker.ietf.org/doc/rfc8433/"
  }
}