%% You should probably cite rfc3601 instead of this I-D.
@techreport{allocchio-gstn-05,
    number =    {draft-allocchio-gstn-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-allocchio-gstn/05/},
    author =    {Claudio Allocchio},
    title =     {{Text String Notation for Dial Sequences and Global Switched Telephone Network (GSTN) / E.164 Addresses}},
    pagetotal = 10,
    year =      2003,
    month =     apr,
    day =       30,
    abstract =  {This memo describes the full set of notations needed to represent a text string in a Dial Sequence. A Dial Sequence is normally composed of Dual Tone Multi Frequency (DTMF) elements, plus separators and additional "actions" (such as "wait for dialtone", "pause for N secs", etc.) which could be needed to successfully establish the connection with the target service: this includes the cases where subaddresses or DTMF menu navigation apply.},
}