\begin{thebibliography}{1}

\bibitem{T.30}
{International Telecommunication Union}, ``Procedures for document facsimile
  transmission in the general switched telephone network,'' Recommendation
  T.30, Telecommunication Standardization Sector of ITU, Geneva, Switzerland,
  July 1996.

\bibitem{T.38}
{International Telecommunication Union}, ``Procedures for real-time group 3
  facsimile communication over {IP} networks,'' Recommendation T.38,
  Telecommunication Standardization Sector of ITU, Geneva, Switzerland, June
  1998.

\bibitem{H.323}
{International Telecommunication Union}, ``Visual telephone systems and
  equipment for local area networks which provide a non-guaranteed quality of
  service,'' Recommendation H.323, Telecommunication Standardization Sector of
  ITU, Geneva, Switzerland, May 1996.

\bibitem{draft-ietf-mmusic-sip}
M.~Handley, H.~Schulzrinne, E.~Schooler, and J.~Rosenberg, ``{SIP:} session
  initiation protocol,'' {Internet Draft}, Internet Engineering Task Force,
  Nov. 1998.
\newblock Work in progress.

\bibitem{rfc2327}
M.~Handley and V.~Jacobson, ``{SDP:} session description protocol,'' RFC 2327,
  Internet Engineering Task Force, Apr. 1998.

\bibitem{rfc1825}
R.~Atkinson, ``Security architecture for the internet protocol,'' RFC 1825,
  Internet Engineering Task Force, Aug. 1995.

\end{thebibliography}
