@misc{rfc4497,
    series =    {Request for Comments},
    number =    4497,
    howpublished =  {RFC 4497},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4497},
    url =       {https://www.rfc-editor.org/info/rfc4497},
    author =    {Olivier Rousseau and Patrick Mourot and John Elwell and Frank Derks},
    title =     {{Interworking between the Session Initiation Protocol (SIP) and QSIG}},
    pagetotal = 65,
    year =      2006,
    month =     may,
    abstract =  {This document specifies interworking between the Session Initiation Protocol (SIP) and QSIG within corporate telecommunication networks (also known as enterprise networks). SIP is an Internet application-layer control (signalling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include, in particular, telephone calls. QSIG is a signalling protocol for creating, modifying, and terminating circuit-switched calls (in particular, telephone calls) within Private Integrated Services Networks (PISNs). QSIG is specified in a number of Ecma Standards and published also as ISO/IEC standards. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.},
}