%% You should probably cite rfc6913 instead of this I-D.
@techreport{hanes-dispatch-fax-capability-02,
    number =    {draft-hanes-dispatch-fax-capability-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hanes-dispatch-fax-capability/02/},
    author =    {David Hanes and Gonzalo Salgueiro and Kevin P. Fleming},
    title =     {{Indicating Fax over IP Capability in the Session Initiation Protocol (SIP)}},
    pagetotal = 8,
    year =      2012,
    month =     sep,
    day =       5,
    abstract =  {This document defines and registers with IANA the new 'fax' media feature tag for use with SIP. Currently, fax calls are indistinguishable from voice at call setup. Consequently, fax calls can be routed to SIP user agents that are not fax capable. A 'fax' media feature tag implemented in conjunction with RFC 3841 allows for more accurate fax call routing.},
}