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<h1 align><A NAME="speakfreely"></A>Speak Freely for Windows</h1>
<P>by <A HREF="aboutau.htm">John Walker</A><br>
<a href="http://www.fourmilab.ch">http://www.fourmilab.ch/</a></P>
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<H3><A NAME="contents"></A>Contents</H3>
<P><i>Speak Freely</i> is a Windows Internet telephone application
that allows you to talk (actually send voice, not typed
characters) over a network. If your network connection isn't
fast enough to support real-time voice data, various forms of
compression may allow you, assuming your computer is fast
enough, to converse nonetheless. To enable secure
communications, encryption with DES, IDEA, and/or a key file is
available. If PGP is installed on your machine, it can be
invoked automatically to exchange IDEA session keys for a given
conversation. <i>Speak Freely</i> for Windows is compatible with
<A HREF="sfunixmanpage.htm"><i>Speak Freely</i> for Unix</A>, and users
of the two programs can intercommunicate. Users can find one
another by communicating with a "Look Who's Listening"
phonebook server. You can <A HREF="face.htm">designate a
bitmap file</A> to be sent to users who connect so they can see
who they're talking to. <i>Speak Freely</i> supports Internet RTP
<A HREF="protocol.htm">protocol</A>, allowing it to communicate
with other Internet voice programs which use that protocol; in
addition, <i>Speak Freely</i> can also communicate with programs which
support the VAT (Visual Audio Tool) protocol.</P>
<p>
<dl>
<dt><a href="introduction.htm"><b>Introduction</b></a>
<dd> <a href="requirements.htm">Hardware and software requirements</a>
<p>
<dt><a href="quickstart.htm"><b>Quick Start Guide</b></a>
<dd></dd>
<p>
<dt><b>Connections</b>
<dd> <a href="newconnection.htm">Creating a new connection</a>
<dd> <a href="connproperties.htm">Setting connection options</a>
<dd> <a href="closeconnection.htm">Closing a connection</a>
<dd> <a href="saveconnection.htm">Saving a connection in a file</a>
<dd> <a href="openconnection.htm">Opening a connection file</a>
<p>
<dt><b>Communicating</b>
<dd> <a href="commreceive.htm">Receiving audio</a>
<dd> <a href="commsend.htm">Sending live audio</a>
<dd> <a href="commsendfile.htm">Sending sound files</a>
<dd> <a href="commring.htm">Ringing remote users</a>
<dd> <a href="loopback.htm">Testing using local loopback</a>
<dd> <a href="multicasting.htm">Multicasting to a group</a>
<dd> <a href="broadcasting.htm">Broadcasting to multiple sites</a>
<dd> <a href="conference.htm">Conferencing</a>
<dd> <a href="propellerhead.htm">Viewing extended status</a>
<dd> <a href="audiomonitor.htm">Monitoring audio levels and spectrum</a>
<dd> <a href="vox.htm">Voice activated transmission</a>
<dd> <a href="protocol.htm">Communicating with other network audio programs</a>
<p>
<dt><a href="answer.htm"><b>The answering machine</b></a>
<p>
<dt><a href="face.htm"><b>Show your face</b></a>
<p>
<dt><a href="chat.htm"><b>Text chat</b></a>
<p>
<dt><b>Phonebook: Look Who's Listening</b>
<dd> <a href="lwl_tell.htm">Publishing your directory entry</a>
<dd> <a href="lwl_ask.htm">Finding on-line users</a>
<p>
<dt><a href="compresswhy.htm"><b>Compression</b></a>
<p>
<dt><b>Encryption</b>
<dd> <a href="encryptwhy.htm">Why encryption?</a>
<dd> Varieties of encryption
<ul>
<li> <a href="encryptaes.htm">AES (Advanced Encryption Standard)</a>
<li> <a href="encryptpgp.htm">PGP key exchange</a>
<li> <a href="encryptdes.htm">DES (Data Encryption Standard)</a>
<li> <a href="encryptblowfish.htm">Blowfish encryption</a>
<li> <a href="encryptidea.htm">IDEA (International Data Encryption Algorithm)</a>
<li> <a href="encryptotp.htm">Key file</a>
</ul>
<dd> <a href="encryptkeys.htm">Generating and exchanging keys</a>
<dd> <a href="encryptlegal.htm">Legal issues</a>
<dd> <a href="encryptpatent.htm">Patent issues</a>
<p>
<dt><a href="winmodes.htm"><b>Window display modes</b></a>
<p>
<dt><b><a href="commandline.htm">Command line arguments</a></b>
<p>
<dt><b>Problems, problems</b>
<dd> <a href="problemsregpauses.htm">Regular pauses in audio output</a>
<dd> <a href="problemsrandpauses.htm">Random pauses in audio output</a>
<dd> <a href="problemscompressslow.htm">Compression <i>slows down</i> transmission</a>
<dd> <a href="propellerhead.htm">Viewing extended status</a>
<dd> <a href="workarounds.htm">Workarounds for various problems</a>
<p>
<dt><b>Internet resources</b>
<dd> <a href="maillist.htm"><i>Speak Freely</i> Internet mailing lists</a>
<dd> <a href="echo.htm">Echo servers</a>
<dd> <a href="lwl_tell.htm">Publishing your directory entry</a>
<dd> <a href="lwl_ask.htm">Finding on-line users</a>
<p>
<dt><b>Debugging tools</b>
<dd> <a href="propellerhead.htm">Viewing extended status</a>
<dd> <a href="loopback.htm">Local loopback</a>
<dd> <a href="echomode.htm">Remote echo mode</a>
<dd> <a href="audiomonitor.htm">Monitoring audio levels and spectrum</a>
<dd> <a href="console.htm">Diagnostic console</a>
<p>
<dt><b>Hardware issues</b>
<dd> <a href="hardabout.htm">Viewing hardware configuration</a>
<dd> <a href="benchmark.htm">Measuring computer performance</a>
<dd> <a href="hardsamplebits.htm">8 or 16 bit sampling?</a>
<dd> <a href="hardduplex.htm">Half- or full-duplex?</a>
<p>
<dt><a href="faq.htm"><b>Bugs, features, and frequently asked questions</b></a>
<p>
<dt><b>References</b>
<dd> <a href="sfunixmanpage.htm"><i>Speak Freely</i> for Unix machines</a>
<dd> <a href="credits.htm">Credits</a>
<dd> <a href="bookshelf.htm">Bookshelf</a>
<dd> <a href="log.htm">Development log</a>
<dd> <a href="aboutau.htm">About the author</a>
</dl>
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