asterisk phpagi returns busy

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).

Answer 2

Ok. You don't need an AGI for this. You can use "GosubIf" to test if a call has the same caller ID as your annoyance caller. Then, use this code:

[no_one_home_but_us_chickens]
exten => s,1,Answer ; can't Playtones unless we answer first
 same => n,Playtones(busy) ; send the audio sequence that humans understand means "busy"
 same => n,Busy(10) ; signal the other end that the line is busy.
 same => n,Hangup()
 same => n,Return()

... much simpler and gets your job done. See: http://www.voip-info.org/wiki/view/Asterisk+cmd+Busy for more information