\begin{thebibliography}{1}

\bibitem{rfc3351}
N.~Charlton, M.~Gasson, G.~Gybels, M.~Spanner, and A.~van Wijk,
  \htmladdnormallink{``User requirements for the session initiation protocol
  {(SIP)} in support of deaf, hard of hearing and speech-impaired
  individuals,''}{http://www.rfc-editor.org/rfc/rfc3351.txt} RFC 3351, Internet
  Engineering Task Force, Aug. 2002.

\bibitem{draft-ietf-ieprep-requirements}
H.~C. Folts, C.~Beard, and K.~Carlberg, \htmladdnormallink{``Requirements for
  emergency telecommunication capabilities in the
  {Internet},''}{http://www.ietf.org/internet-drafts/draft-ietf-ieprep-require%
ments-01.txt} internet draft, Internet Engineering Task Force, Oct. 2002.
\newblock Work in progress.

\end{thebibliography}
