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<td class="content-excerpt-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 0 24px"> <h1 id="Asterisk17Application_AMD-AMD()" style="margin: 10px 0 0 0; margin-top: 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0; margin-top: 0">AMD()</h1> <h3 id="Asterisk17Application_AMD-Synopsis" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0">Synopsis</h3> <p style="margin: 10px 0 0 0">Attempt to detect answering machines.</p> <h3 id="Asterisk17Application_AMD-Description" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0">Description</h3> <p style="margin: 10px 0 0 0">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 style="margin: 10px 0 0 0">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 style="margin: 10px 0 0 0">This application sets the following channel variables:</p>
<ul style="margin: 10px 0 0 0">
<li> <code style="font-family: monospace">AMDSTATUS</code> - This is the status of the answering machine detection
<ul style="margin: 10px 0 0 0">
<li>MACHINE</li>
<li>HUMAN</li>
<li>NOTSURE</li>
<li>HANGUP</li>
</ul> </li>
<li> <code style="font-family: monospace">AMDCAUSE</code> - Indicates the cause that led to the conclusion
<ul style="margin: 10px 0 0 0">
<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 Length - max length of a single word.</li>
<li>MAXWORDS - Word Count - maximum number of words.</li>
</ul> </li>
</ul> <h3 id="Asterisk17Application_AMD-Syntax" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0">Syntax</h3>
<div class="preformatted panel" style="border-width: 1px;">
<div class="preformattedContent panelContent">
<pre style="margin: 10px 0 0 0; margin-top: 0">AMD([initialSilence,[greeting,[afterGreetingSilence,[totalAnalysis Time,[miniumWordLength,[betweenWordSilence,[maximumNumberOfWords,[silenceThreshold,[maximumWordLength]]]]]]]]])</pre>
</div>
</div> <h5 id="Asterisk17Application_AMD-Arguments" style="margin: 10px 0 0 0; color: #707070; font-size: 14px; line-height: 20px; margin: 20px 0 0 0">Arguments</h5>
<ul style="margin: 10px 0 0 0">
<li> <code style="font-family: monospace">initialSilence</code> - Is maximum initial silence duration before greeting.<br /> If this is exceeded, the result is detection as a MACHINE</li>
<li> <code style="font-family: monospace">greeting</code> - is the maximum length of a greeting.<br /> If this is exceeded, the result is detection as a MACHINE</li>
<li> <code style="font-family: monospace">afterGreetingSilence</code> - Is the silence after detecting a greeting.<br /> If this is exceeded, the result is detection as a HUMAN</li>
<li> <code style="font-family: monospace">totalAnalysis Time</code> - Is the maximum time allowed for the algorithm<br /> to decide on whether the audio represents a HUMAN, or a MACHINE</li>
<li> <code style="font-family: monospace">miniumWordLength</code> - Is the minimum duration of Voice considered to be a word</li>
<li> <code style="font-family: monospace">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 style="font-family: monospace">maximumNumberOfWords</code> - Is the maximum number of words in a greeting<br /> If this is exceeded, then the result is detection as a MACHINE</li>
<li> <code style="font-family: monospace">silenceThreshold</code> - What is the average level of noise from 0 to 32767 which if not exceeded, should be considered silence?</li>
<li> <code style="font-family: monospace">maximumWordLength</code> - Is the maximum duration of a word to accept.<br /> If exceeded, then the result is detection as a MACHINE</li>
</ul> <h3 id="Asterisk17Application_AMD-SeeAlso" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0">See Also</h3>
<ul style="margin: 10px 0 0 0">
<li> <a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+17+Application_WaitForSilence" style="color: #3b73af; text-decoration: none">Asterisk 17 Application_WaitForSilence</a> </li>
<li> <a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+17+Application_WaitForNoise" style="color: #3b73af; text-decoration: none">Asterisk 17 Application_WaitForNoise</a> </li>
</ul> <h3 id="Asterisk17Application_AMD-ImportVersion" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0">Import Version</h3> <p style="margin: 10px 0 0 0">This documentation was imported from Asterisk Version GIT-17-7300bdd</p> </td>
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