@techreport{roach-mmusic-sip-pstn-require-header-00,
    number =    {draft-roach-mmusic-sip-pstn-require-header-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-mmusic-sip-pstn-require-header/00/},
    author =    {Adam Roach},
    title =     {{SIP PSTN Interworking Umbrella 'Require:' Header}},
    pagetotal = 7,
    year =      1999,
    month =     jun,
    day =       24,
    abstract =  {This document outlines a new value for the SIP 'Require:'header which denotes compliance with a number of mechanisms necessary to interwork smoothly with existing telephony networks.},
}