@misc{rfc7195,
    series =    {Request for Comments},
    number =    7195,
    howpublished =  {RFC 7195},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC7195},
    url =       {https://www.rfc-editor.org/info/rfc7195},
    author =    {Miguel Angel García and Simo Veikkolainen},
    title =     {{Session Description Protocol (SDP) Extension for Setting Audio and Video Media Streams over Circuit-Switched Bearers in the Public Switched Telephone Network (PSTN)}},
    pagetotal = 39,
    year =      2014,
    month =     may,
    abstract =  {This memo describes use cases, requirements, and protocol extensions for using the Session Description Protocol (SDP) offer/answer model for establishing audio and video media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN).},
}