asterisk phpagi返回忙碌

Question

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?

Here is part of my script

  require_once('phpagi.php');

  $agi = new AGI();
  //$agi->answer();


stuff here

$agi->hangup();

Answer 1

There are 2 variants:

1)

$agi->exec("Busy","");

2) Answer before hangup(if prevous not help).