\begin{thebibliography}{10}

\bibitem{Stev94:TCP1}
W.~R. Stevens, {\em {TCP/IP} illustrated: the protocols}, vol.~1.
\newblock Reading, Massachusetts: Addison-Wesley, 1994.

\bibitem{Pand9506:Emerging}
R.~Pandya, ``Emerging mobile and personal communication systems,'' {\em IEEE
  Communications Magazine}, vol.~33, pp.~44--52, June 1995.

\bibitem{draft-ietf-sip-call-flows}
A.~Johnston, S.~Donovan, R.~Sparks, C.~Cunningham, D.~Willis, J.~Rosenberg,
  K.~Summers, and H.~Schulzrinne, ``{SIP} telephony call flow examples,''
  {Internet Draft}, Internet Engineering Task Force, Apr. 2001.
\newblock Work in progress.

\bibitem{rfc1191}
J.~C. Mogul and S.~E. Deering, ``Path {MTU} discovery,'' Request for Comments
  1191, Internet Engineering Task Force, Nov. 1990.

\bibitem{rfc1321}
R.~Rivest, ``The {MD5} message-digest algorithm,'' Request for Comments 1321,
  Internet Engineering Task Force, Apr. 1992.

\bibitem{rfc1889}
H.~Schulzrinne, S.~Casner, R.~Frederick, and V.~Jacobson, ``{RTP:} a transport
  protocol for real-time applications,'' Request for Comments 1889, Internet
  Engineering Task Force, Jan. 1996.

\bibitem{rfc1890}
H.~Schulzrinne, ``{RTP} profile for audio and video conferences with minimal
  control,'' Request for Comments 1890, Internet Engineering Task Force, Jan.
  1996.

\bibitem{rfc2076}
J.~Palme, ``Common internet message headers,'' Request for Comments 2076,
  Internet Engineering Task Force, Feb. 1997.

\bibitem{rfc2205}
R.~Braden, Ed., L.~Zhang, S.~Berson, S.~Herzog, and S.~Jamin, ``Resource
  {ReSerVation} protocol {(RSVP)} -- version 1 functional specification,''
  Request for Comments 2205, Internet Engineering Task Force, Sept. 1997.

\bibitem{rfc2326}
H.~Schulzrinne, A.~Rao, and R.~Lanphier, ``Real time streaming protocol
  {(RTSP)},'' Request for Comments 2326, Internet Engineering Task Force, Apr.
  1998.

\bibitem{rfc2368}
P.~Hoffman, L.~Masinter, and J.~Zawinski, ``The mailto {URL} scheme,'' Request
  for Comments 2368, Internet Engineering Task Force, July 1998.

\bibitem{rfc2426}
F.~Dawson and T.~Howes, ``vcard {MIME} directory profile,'' Request for
  Comments 2426, Internet Engineering Task Force, Sept. 1998.

\bibitem{rfc2849}
G.~Good, ``The {LDAP} data interchange format {(LDIF)} - technical
  specification,'' Request for Comments 2849, Internet Engineering Task Force,
  June 2000.

\bibitem{rfc2974}
M.~Handley, C.~Perkins, and E.~Whelan, ``Session announcement protocol,''
  Request for Comments 2974, Internet Engineering Task Force, Oct. 2000.

\bibitem{rfc2976}
S.~Donovan, ``The {SIP} {INFO} method,'' Request for Comments 2976, Internet
  Engineering Task Force, Oct. 2000.

\bibitem{Scho9608:Multicast}
E.~M. Schooler, ``A multicast user directory service for synchronous
  rendezvous,'' Master's Thesis CS-TR-96-18, Department of Computer Science,
  California Institute of Technology, Pasadena, California, Aug. 1996.

\bibitem{Scho9306:Case}
E.~M. Schooler, ``Case study: multimedia conference control in a
  packet-switched teleconferencing system,'' {\em Journal of Internetworking:
  Research and Experience}, vol.~4, pp.~99--120, June 1993.
\newblock ISI reprint series ISI/RS-93-359.

\bibitem{Schu9603:Personal}
H.~Schulzrinne, ``Personal mobility for multimedia services in the
  {Internet},'' in {\em European Workshop on Interactive Distributed Multimedia
  Systems and Services (IDMS)}, (Berlin, Germany), Mar. 1996.

\bibitem{rfc3015}
F.~Cuervo, N.~Greene, A.~Rayhan, C.~Huitema, B.~Rosen, and J.~Segers, ``Megaco
  protocol version 1.0,'' Request for Comments 3015, Internet Engineering Task
  Force, Nov. 2000.

\bibitem{rfc2732}
R.~Hinden, B.~Carpenter, and L.~Masinter, ``Format for literal {IPv6} addresses
  in {URL's},'' Request for Comments 2732, Internet Engineering Task Force,
  Dec. 1999.

\bibitem{rfc2543}
M.~Handley, H.~Schulzrinne, E.~Schooler, and J.~Rosenberg, ``{SIP:} session
  initiation protocol,'' Request for Comments 2543, Internet Engineering Task
  Force, Mar. 1999.

\end{thebibliography}
