@techreport{hautakorpi-reason-header-for-warnings-00,
    number =    {draft-hautakorpi-reason-header-for-warnings-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-hautakorpi-reason-header-for-warnings/00/},
    author =    {Jani Hautakorpi and Gonzalo Camarillo},
    title =     {{Extending the Session Initiation Protocol Reason Header with Warning Codes}},
    pagetotal = 9,
    year =      2005,
    month =     oct,
    day =       17,
    abstract =  {This document specifies a new protocol value, called 'SIP-Warning', for the Session Initiation Protocol (SIP) Reason header. The values for the name space of 'SIP-Warning' are taken from the Warning codes (warn-codes) of SIP. In addition, this document also defines one new SIP Warning code to be used in situations where User Agent Server (UAS) does not accept calls from an anonymous source.},
}