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<h2><a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+10+Application_AMD">Asterisk 10 Application_AMD</a></h2>
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<h1><a name="Asterisk10Application_AMD-AMD%28%29"></a>AMD()</h1>
<h3><a name="Asterisk10Application_AMD-Synopsis"></a>Synopsis</h3>
<p>Attempt to detect answering machines.</p>
<h3><a name="Asterisk10Application_AMD-Description"></a>Description</h3>
<p>This application attempts to detect answering machines at the beginning of outbound calls. Simply call this application after the call has been answered (outbound only, of course). </p>
<p>When loaded, AMD reads amd.conf and uses the parameters specified as default values. Those default values get overwritten when the calling AMD with parameters. </p>
<p>This application sets the following channel variables: </p>
<ul>
<li><tt>AMDSTATUS</tt> - This is the status of the answering machine detection
<ul>
<li><tt>MACHINE</tt></li>
<li><tt>HUMAN</tt></li>
<li><tt>NOTSURE</tt></li>
<li><tt>HANGUP</tt></li>
</ul>
</li>
<li><tt>AMDCAUSE</tt> - Indicates the cause that led to the conclusion
<ul>
<li><tt>TOOLONG</tt> - Total Time.</li>
<li><tt>INITIALSILENCE</tt> - Silence Duration - Initial Silence.</li>
<li><tt>HUMAN</tt> - Silence Duration - afterGreetingSilence.</li>
<li><tt>LONGGREETING</tt> - Voice Duration - Greeting.</li>
<li><tt>MAXWORDLENGTH</tt> - Word Count - maximum number of words.</li>
</ul>
</li>
</ul>
<h3><a name="Asterisk10Application_AMD-Syntax"></a>Syntax</h3>
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<pre>AMD([initialSilence[,greeting[,afterGreetingSilence[,totalAnalysis Time[,miniumWordLength[,betweenWordSilence[,maximumNumberOfWords[,silenceThreshold[,maximumWordLength]]]]]]]]])</pre>
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<h5><a name="Asterisk10Application_AMD-Arguments"></a>Arguments</h5>
<ul>
<li><tt>initialSilence</tt> - Is maximum initial silence duration before greeting. If this is exceeded set as MACHINE</li>
<li><tt>greeting</tt> - is the maximum length of a greeting. If this is exceeded set as MACHINE</li>
<li><tt>afterGreetingSilence</tt> - Is the silence after detecting a greeting. If this is exceeded set as HUMAN</li>
<li><tt>totalAnalysis Time</tt> - Is the maximum time allowed for the algorithm to decide HUMAN or MACHINE</li>
<li><tt>miniumWordLength</tt> - Is the minimum duration of Voice considered to be a word</li>
<li><tt>betweenWordSilence</tt> - Is the minimum duration of silence after a word to consider the audio that follows to be a new word</li>
<li><tt>maximumNumberOfWords</tt> - Is the maximum number of words in a greeting If this is exceeded set as MACHINE</li>
<li><tt>silenceThreshold</tt> - How long do we consider silence</li>
<li><tt>maximumWordLength</tt> - Is the maximum duration of a word to accept. If exceeded set as MACHINE</li>
</ul>
<h3><a name="Asterisk10Application_AMD-SeeAlso"></a>See Also</h3>
<p><a href="/wiki/pages/createpage.action?spaceKey=AST&title=Asterisk+10+Application_WaitForSilence&linkCreation=true&fromPageId=19005648" class="createlink">Asterisk 10 Application_WaitForSilence</a><br/>
<a href="/wiki/pages/createpage.action?spaceKey=AST&title=Asterisk+10+Application_WaitForNoise&linkCreation=true&fromPageId=19005648" class="createlink">Asterisk 10 Application_WaitForNoise</a></p>
<h3><a name="Asterisk10Application_AMD-ImportVersion"></a>Import Version</h3>
<p>This documentation was imported from Asterisk version SVN-branch-10-r340810.</p>
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