@techreport{ietf-avt-dtmf-01,
    number =    {draft-ietf-avt-dtmf-01},
    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-dtmf/01/},
    author =    {Henning Schulzrinne},
    title =     {{RTP Payload for DTMF Digits}},
    pagetotal = 6,
    year =      1998,
    month =     nov,
    day =       23,
    abstract =  {This memo describes how to carry dual-tone multifrequency (DTMF) signaling and other tone signals in RTP packets.},
}