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<h2><a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+10+Application_ChanIsAvail">Asterisk 10 Application_ChanIsAvail</a></h2>
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<h1><a name="Asterisk10Application_ChanIsAvail-ChanIsAvail%28%29"></a>ChanIsAvail()</h1>
<h3><a name="Asterisk10Application_ChanIsAvail-Synopsis"></a>Synopsis</h3>
<p>Check channel availability</p>
<h3><a name="Asterisk10Application_ChanIsAvail-Description"></a>Description</h3>
<p>This application will check to see if any of the specified channels are available. </p>
<p>This application sets the following channel variables: </p>
<ul>
<li><tt>AVAILCHAN</tt> - The name of the available channel, if one exists</li>
<li><tt>AVAILORIGCHAN</tt> - The canonical channel name that was used to create the channel</li>
<li><tt>AVAILSTATUS</tt> - The device state for the device</li>
<li><tt>AVAILCAUSECODE</tt> - The cause code returned when requesting the channel</li>
</ul>
<h3><a name="Asterisk10Application_ChanIsAvail-Syntax"></a>Syntax</h3>
<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
<pre>ChanIsAvail([Technology2/Resource2[&...]][,options])</pre>
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<h5><a name="Asterisk10Application_ChanIsAvail-Arguments"></a>Arguments</h5>
<ul>
<li><tt>Technology/Resource</tt> - Specification of the device(s) to check. These must be in the format of <tt>Technology/Resource</tt>, where <em>Technology</em> represents a particular channel driver, and <em>Resource</em> represents a resource available to that particular channel driver.
<ul>
<li><tt>Technology2/Resource2</tt> - Optional extra devices to check If you need more then one enter them as Technology2/Resource2&Technology3/Resourse3&.....</li>
</ul>
</li>
<li><tt>options</tt>
<ul>
<li><tt>a</tt> - Check for all available channels, not only the first one</li>
<li><tt>s</tt> - Consider the channel unavailable if the channel is in use at all</li>
<li><tt>t</tt> - Simply checks if specified channels exist in the channel list</li>
</ul>
</li>
</ul>
<h3><a name="Asterisk10Application_ChanIsAvail-SeeAlso"></a>See Also</h3>
<h3><a name="Asterisk10Application_ChanIsAvail-ImportVersion"></a>Import Version</h3>
<p>This documentation was imported from Asterisk version SVN-branch-10-r340810.</p>
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