\begin{thebibliography}{1}

\bibitem{rfc3050}
J.~Lennox, H.~Schulzrinne, and J.~Rosenberg, ``Common gateway interface for
  {SIP},'' RFC 3050, Internet Engineering Task Force, Jan. 2001.

\bibitem{draft-ietf-iptel-cpl}
J.~Lennox and H.~Schulzrinne, ``{CPL}: A language for user control of internet
  telephony services,'' {Internet Draft}, Internet Engineering Task Force, Nov.
  2001.
\newblock Work in progress.

\bibitem{rfc3204}
E.~Zimmerer, J.~Peterson, A.~Vemuri, L.~Ong, F.~Audet, M.~Watson, and
  M.~Zonoun, ``{MIME} media types for {ISUP} and {QSIG} objects,'' RFC 3204,
  Internet Engineering Task Force, Dec. 2001.

\bibitem{rfc3372}
A.~Vemuri and J.~Peterson, ``Session initiation protocol for telephones
  {(SIP-T):} {(SIP-T):} context and architectures,'' RFC 3372, Internet
  Engineering Task Force, Sept. 2002.

\bibitem{draft-ietf-ieprep-security}
I.~Brown, ``A security framework for emergency communications,'' {Internet
  Draft}, Internet Engineering Task Force, June 2002.
\newblock Work in progress.

\bibitem{draft-ietf-sip-privacy-general}
J.~Peterson, ``A privacy mechanism for the session initiation protocol
  ({SIP}),'' {Internet Draft}, Internet Engineering Task Force, June 2002.
\newblock Work in progress.

\bibitem{draft-ietf-sipping-nai-reqs}
M.~Watson, ``Short term requirements for network asserted identity,'' {Internet
  Draft}, Internet Engineering Task Force, June 2002.
\newblock Work in progress.

\end{thebibliography}
