@techreport{elwell-sipping-qsig2sip-03,
    number =    {draft-elwell-sipping-qsig2sip-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-elwell-sipping-qsig2sip/03/},
    author =    {John Elwell},
    title =     {{Interworking between SIP and QSIG}},
    pagetotal = 55,
    year =      2002,
    month =     oct,
    day =       24,
    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. As the support of telephony within corporate networks evolves from circuit-switched technology to Internet technology, the two technologies will co-exist in many networks for a period, perhaps several years. Therefore there is a need to be able to establish, modify and terminate sessions involving a participant in the SIP network and a participant in the QSIG network. Such calls are supported by gateways that perform interworking between SIP and QSIG. This document is a product of the authors' activities in ECMA (www.ecma.ch) on interoperability of QSIG with IP networks.},
}