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                            Asterisk Project : Asterisk 13 Application_AMD
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            Created by <span class='author'> wikibot</span> on Aug 08, 2014
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                    <h1 id="Asterisk13Application_AMD-AMD()">AMD()</h1>

<h3 id="Asterisk13Application_AMD-Synopsis">Synopsis</h3>

<p>Attempt to detect answering machines.</p>

<h3 id="Asterisk13Application_AMD-Description">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><code>AMDSTATUS</code> - 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><code>AMDCAUSE</code> - 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 id="Asterisk13Application_AMD-Syntax">Syntax</h3>


<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
<pre>AMD([initialSilence,[greeting,[afterGreetingSilence,[totalAnalysis Time,[miniumWordLength,[betweenWordSilence,[maximumNumberOfWords,[silenceThreshold,[maximumWordLength]]]]]]]]])</pre>
</div></div>

<h5 id="Asterisk13Application_AMD-Arguments">Arguments</h5>

<ul>
	<li><code>initialSilence</code> - Is maximum initial silence duration before greeting.<br />
If this is exceeded set as MACHINE</li>
	<li><code>greeting</code> - is the maximum length of a greeting.<br />
If this is exceeded set as MACHINE</li>
	<li><code>afterGreetingSilence</code> - Is the silence after detecting a greeting.<br />
If this is exceeded set as HUMAN</li>
	<li><code>totalAnalysis Time</code> - Is the maximum time allowed for the algorithm<br />
to decide HUMAN or MACHINE</li>
	<li><code>miniumWordLength</code> - Is the minimum duration of Voice considered to be a word</li>
	<li><code>betweenWordSilence</code> - Is the minimum duration of silence after a word to consider the audio that follows to be a new word</li>
	<li><code>maximumNumberOfWords</code> - Is the maximum number of words in a greeting<br />
If this is exceeded set as MACHINE</li>
	<li><code>silenceThreshold</code> - How long do we consider silence</li>
	<li><code>maximumWordLength</code> - Is the maximum duration of a word to accept.<br />
If exceeded set as MACHINE</li>
</ul>


<h3 id="Asterisk13Application_AMD-SeeAlso">See Also</h3>

<ul>
	<li><a href="Asterisk-13-Application_WaitForSilence_29394442.html">Asterisk 13 Application_WaitForSilence</a></li>
	<li><a href="Asterisk-13-Application_WaitForNoise_29394443.html">Asterisk 13 Application_WaitForNoise</a></li>
</ul>


<h3 id="Asterisk13Application_AMD-ImportVersion">Import Version</h3>

<p>This documentation was imported from Asterisk Version SVN-branch-13-r420538</p>
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                    <p>Document generated by Confluence on Aug 11, 2014 13:44</p>
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