@misc{rfc4715,
    series =    {Request for Comments},
    number =    4715,
    howpublished =  {RFC 4715},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4715},
    url =       {https://www.rfc-editor.org/info/rfc4715},
    author =    {Shida Schubert and Takumi Ohba and Mayumi Munakata},
    title =     {{The Integrated Services Digital Network (ISDN) Subaddress Encoding Type for tel URI}},
    pagetotal = 14,
    year =      2006,
    month =     nov,
    abstract =  {Without a tel URI parameter to carry an encoding type of Integrated Services Digital Network (ISDN) subaddress, interworking between ISDN User Part (ISUP) network and a Session Initiation Protocol (SIP) network is impossible in some cases. To solve this problem, this document specifies a new optional tel URI parameter to carry the encoding type of ISDN subaddress. This memo provides information for the Internet community.},
}