Twilio SIP Voice Receiver => Asterisk PBX

Twilio-Voice.php

<?php echo '<?xml version="1.0" encoding="UTF-8"?>'."\n";
/**
 * Twilio SIP Voice Receiver => Asterisk PBX (also works on FreePBX's Inbound Routes)
 * (Constructive suggestions for improvement are certainly welcomed.)
 * 
 * Based on dealing with Jonathan Gottfried's blog entry on Twilio re: Twilio => SIP => Asterisk:
 * https://www.twilio.com/blog/2013/03/build-a-twilio-hard-phone-with-sip-from-twilio-raspberry-pi-asterisk-freepbx-and-the-obihai-obi100.html
 * 
 * Point Twilio Voice Request URL to http://YOUR-SERVER.COM/path/call.php/###-###-####
 * 
 * -Louis T. Getterman IV
 * https://twitter.com/LTGIV
 * https://github.com/LTGIV
 */
$reqNum	=	substr($_ENV["PATH_INFO"], 1);
$reqNum	=	str_replace("-", "", $reqNum);
?>
<Response>
<Dial>

<Sip>
<Uri username="twilio1" password="drawtheowl"><?php echo($reqNum);?>@YOUR-SIP-SERVER.COM</Uri>
<Uri username="twilio2" password="drawtheowl"><?php echo($reqNum);?>@YOUR-SIP-SERVER.COM</Uri>
<Uri username="twilio3" password="drawtheowl"><?php echo($reqNum);?>@YOUR-SIP-SERVER.COM</Uri>
</Sip>

</Dial>
</Response>