@techreport{roach-sip-409-00,
    number =    {draft-roach-sip-409-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-roach-sip-409/00/},
    author =    {Adam Roach},
    title =     {{A 'Conflict' Response Code for the Session Initiation Protocol (SIP)}},
    pagetotal = 4,
    year =      2003,
    month =     aug,
    day =       6,
    abstract =  {This document proposes an addition of a '409 Conflict' response code for the Session Initiation protocol. This response code is required for a number of application-specific purposes, and is expected to be useful in future extensions to the protocol.},
}