@techreport{schulzrinne-sip-register-01,
    number =    {draft-schulzrinne-sip-register-01},
    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-sip-register/01/},
    author =    {Henning Schulzrinne},
    title =     {{SIP Registration}},
    pagetotal = 10,
    year =      2001,
    month =     apr,
    day =       24,
    abstract =  {SIP registration provides personal, pre-call terminal and service mobility. We describe the registration process in detail, considering different options for roaming users.},
}