@techreport{camarillo-dispatch-precons-00,
    number =    {draft-camarillo-dispatch-precons-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-camarillo-dispatch-precons/00/},
    author =    {Gonzalo Camarillo and Jouni Maenpaa and Gao yang},
    title =     {{Media State under Preconditions in the Session Initiation Protocol (SIP)}},
    pagetotal = 9,
    year =      2010,
    month =     mar,
    day =       8,
    abstract =  {In this document, we describe how a UAS (User Agent Server) involved in a session modification can explicitly signal the point where the new session parameters start being used. Explicitly signalling such a change in the session parameters can be useful so that network intermediaries such as B2BUAs (Back-to-back User Agents) have a clear picture of the session's state at every point.},
}