{
  "draft": "draft-ietf-sipping-reason-header-for-preemption-04",
  "doc_id": "RFC4411",
  "title": "Extending the Session Initiation Protocol (SIP) Reason Header for Preemption Events",
  "authors": [
    "J. Polk"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "22",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Session Initiation Proposal Investigation",
  "abstract": "This document proposes an IANA Registration extension to the Session Initiation Protocol (SIP) Reason Header to be included in a BYE Method Request as a result of a session preemption event, either at a user agent (UA), or somewhere in the network involving a reservation-based protocol such as the Resource ReSerVation Protocol (RSVP) or Next Steps in Signaling (NSIS).  This document does not attempt to address routers failing in the packet path; instead, it addresses a deliberate tear down of a flow between UAs, and informs the terminated UA(s) with an indication of what occurred. [STANDARDS-TRACK]",
  "pub_date": "February 2006",
  "keywords": [
    "Resource-Priority",
    "preempt",
    "preempted",
    "Q.850",
    "preconditions"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC4411",
  "errata_url": null
}