@techreport{schulzrinne-sipping-emergency-arch-02,
    number =    {draft-schulzrinne-sipping-emergency-arch-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-schulzrinne-sipping-emergency-arch/02/},
    author =    {Henning Schulzrinne and Brian Rosen},
    title =     {{Emergency Services for Internet Telephony Systems}},
    pagetotal = 26,
    year =      2004,
    month =     oct,
    day =       25,
    abstract =  {Summoning emergency help is a core feature of telephone networks. This document describes how the Session Initiation Protocol (SIP) can be used to provide advanced emergency services for voice-over-IP (VoIP). The architecture employs standard SIP features and requires no new protocol mechanisms. DNS is used to map civil and geospatial locations to the appropriate emergency call center.},
}