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<h2><a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+11+Application_AMD">Asterisk 11 Application_AMD</a></h2>
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<h1><a name="Asterisk11Application_AMD-AMD%28%29"></a>AMD()</h1>
<h3><a name="Asterisk11Application_AMD-Synopsis"></a>Synopsis</h3>
<p>Attempt to detect answering machines.</p>
<h3><a name="Asterisk11Application_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>AMDSTATUS - This is the status of the answering machine detection
<ul>
<li>MACHINE</li>
<li>HUMAN</li>
<li>NOTSURE</li>
<li>HANGUP</li>
</ul>
</li>
<li>AMDCAUSE - Indicates the cause that led to the conclusion
<ul>
<li>TOOLONG - Total Time.</li>
<li>INITIALSILENCE - Silence Duration - Initial Silence.</li>
<li>HUMAN - Silence Duration - afterGreetingSilence.</li>
<li>LONGGREETING - Voice Duration - Greeting.</li>
<li>MAXWORDLENGTH - Word Count - maximum number of words.</li>
</ul>
</li>
</ul>
<h3><a name="Asterisk11Application_AMD-Syntax"></a>Syntax</h3>
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<pre>AMD([initialSilence[,greeting[,afterGreetingSilence[,totalAnalysis Time[,miniumWordLength[,betweenWordSilence[,maximumNumberOfWords[,silenceThreshold[,maximumWordLength]]]]]]]]])</pre>
</div></div>
<h5><a name="Asterisk11Application_AMD-Arguments"></a>Arguments</h5>
<ul>
<li>initialSilence - Is maximum initial silence duration before greeting.If this is exceeded set as MACHINE</li>
<li>greeting - is the maximum length of a greeting.If this is exceeded set as MACHINE</li>
<li>afterGreetingSilence - Is the silence after detecting a greeting.If this is exceeded set as HUMAN</li>
<li>totalAnalysis Time - Is the maximum time allowed for the algorithmto decide HUMAN or MACHINE</li>
<li>miniumWordLength - Is the minimum duration of Voice considered to be a word</li>
<li>betweenWordSilence - Is the minimum duration of silence after a word to consider the audio that follows to be a new word</li>
<li>maximumNumberOfWords - Is the maximum number of words in a greetingIf this is exceeded set as MACHINE</li>
<li>silenceThreshold - How long do we consider silence</li>
<li>maximumWordLength - Is the maximum duration of a word to accept.If exceeded set as MACHINE</li>
</ul>
<h3><a name="Asterisk11Application_AMD-SeeAlso"></a>See Also</h3>
<ul>
<li><a href="/wiki/pages/createpage.action?spaceKey=AST&title=Asterisk+11+Application_WaitForSilence&linkCreation=true&fromPageId=20186964" class="createlink">Asterisk 11 Application_WaitForSilence</a></li>
<li><a href="/wiki/pages/createpage.action?spaceKey=AST&title=Asterisk+11+Application_WaitForNoise&linkCreation=true&fromPageId=20186964" class="createlink">Asterisk 11 Application_WaitForNoise</a></li>
</ul>
<h3><a name="Asterisk11Application_AMD-ImportVersion"></a>Import Version</h3>
<p>This documentation was imported from Asterisk Version SVN-trunk-r370322</p>
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