%% You should probably cite rfc5459 instead of this I-D.
@techreport{ietf-avt-rfc4749-dtx-update-03,
    number =    {draft-ietf-avt-rfc4749-dtx-update-03},
    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-avt-rfc4749-dtx-update/03/},
    author =    {Aurelien Sollaud},
    title =     {{G.729.1 RTP Payload Format Update: Discontinuous Transmission (DTX) Support}},
    pagetotal = 7,
    year =      2008,
    month =     dec,
    day =       8,
    abstract =  {This document updates the Real-time Transport Protocol (RTP) payload format to be used for the International Telecommunication Union (ITU-T) Recommendation G.729.1 audio codec. It adds Discontinuous Transmission (DTX) support to the RFC 4749 specification, in a backward-compatible way. An updated media type registration is included for this payload format. {[}STANDARDS-TRACK{]}},
}