title: asterisk phpagi returns busy
body: <p>Right now, I'm having my script to not pick up a call, but on their end, it retries 3 times so my asterisk server gets hit 3 times. How do I may return a busy signal rather than not answering a call? or any other way to prevent their client end from hitting my server 3 times for each call I don't have my agi script answering the call?</p>
  
  <p>Here is part of my script</p>
  
  <pre><code>  require_once('phpagi.php');
  
    $agi = new AGI();
    //$agi-&gt;answer();
  
  
  stuff here
  
  $agi-&gt;hangup();
  </code></pre>