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    <h2><a href="https://wiki.asterisk.org/wiki/display/AST/Asterisk+11+Application_ChanIsAvail">Asterisk 11 Application_ChanIsAvail</a></h2>
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         <h1><a name="Asterisk11Application_ChanIsAvail-ChanIsAvail%28%29"></a>ChanIsAvail()</h1>

<h3><a name="Asterisk11Application_ChanIsAvail-Synopsis"></a>Synopsis</h3>

<p>Check channel availability</p>
<h3><a name="Asterisk11Application_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>AVAILCHAN - The name of the available channel, if one exists</li>
        <li>AVAILORIGCHAN - The canonical channel name that was used to create the channel</li>
        <li>AVAILSTATUS - The device state for the device</li>
        <li>AVAILCAUSECODE - The cause code returned when requesting the channel</li>
</ul>


<h3><a name="Asterisk11Application_ChanIsAvail-Syntax"></a>Syntax</h3>

<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
<pre>ChanIsAvail(Technology2/Resource2[&amp;...][,options])</pre>
</div></div>
<h5><a name="Asterisk11Application_ChanIsAvail-Arguments"></a>Arguments</h5>


<ul>
        <li>Technology/Resource -
        <ul>
                <li>Technology2/Resource2 - Optional extra devices to checkIf you need more then one enter them as Technology2/Resource2&amp;Technology3/Resourse3&amp;.....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.</li>
        </ul>
        </li>
        <li>options
        <ul>
                <li>a - Check for all available channels, not only the first one</li>
                <li>s - Consider the channel unavailable if the channel is in use at all</li>
                <li>t - Simply checks if specified channels exist in the channel list</li>
        </ul>
        </li>
</ul>



<h3><a name="Asterisk11Application_ChanIsAvail-ImportVersion"></a>Import Version</h3>

<p>This documentation was imported from Asterisk Version SVN-trunk-r370322</p>
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