@techreport{ietf-mmusic-sip-caller-00,
    number =    {draft-ietf-mmusic-sip-caller-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-ietf-mmusic-sip-caller/00/},
    author =    {Jonathan Rosenberg and Henning Schulzrinne},
    title =     {{SIP Caller Preferences and Callee Capabilities}},
    pagetotal = 16,
    year =      1999,
    month =     mar,
    day =       19,
    abstract =  {This document describes a set of extensions to SIP which allow a caller to express preferences about request handling in servers. It also extends the SIP Contact header to allow users to describe their communications capabilities and characteristics.},
}