Page when no agents are in queue

This is really crude. I was bored and looking for a challenge, so I ripped it together in 15 minutes from code in a couple other of my applications. The gist is it continually asks the manager for the status of queues and the agent members. If a queue has calls in it and no agents logged it, it generates a .call file in /var/spool/asterisk/outgoing that opens an intercom to an extension (defined at the top of the code) and uses Flite to play a message "Queue has a caller without an agent". It could be a lot better ;)

Create /var/lib/asterisk/bin/monitor_queues.php:

<?php
  // The extension to page
  $page_ext = "4002";

  require_once "/var/lib/asterisk/agi-bin/phpagi-asmanager.php";

  $asm = new AGI_AsteriskManager();
  $asm->connect("localhost","admin","amp111");

  function auto_dial($channel,$context,$message)  {
    $call_file = "channel: $channel\n";
    if($retries)  {
      $call_file .= "maxretries: $retries\n";
      if($retrytime)
        $call_file .= "retrytime: $retrytime\n";
    }
    $call_file .= "waittime: 30\n".
                  "application: Flite\n".
                  "data: $message";
    $file = md5(time()).".call";
    file_put_contents("/tmp/$file",$call_file);
    rename("/tmp/$file","/var/spool/asterisk/outgoing/$file");
  }

  function asm_event_queues($e, $parameters, $server, $port)  {
    global $asm;
    global $queue_details;
    if(sizeof($parameters))  {
      if($parameters[Event] = "QueueParams")
        $queue_details[] = $parameters;

    }
  }

  function get_queues()  {
    global $asm;
    $asm->add_event_handler("queueparams","asm_event_queues");
    $asm->add_event_handler("queuestatuscomplete","asm_event_queues");
    $asm->add_event_handler("queuemember","asm_event_queues");

    global $queue_details;
    while(!$queue_details)  {
      $asm->QueueStatus();
    }
    return $queue_details;
  }
  while(1)  {

    $queues = get_queues();
    $active_queues = array();
    for($i = 0; $i < sizeof($queues); $i++)  {
      if($queues[$i][Calls] > 0)  {
        $active_queues[$queues[$i][Queue]]['members'] = "inactive";
        for($j = 0; $j < sizeof($queues); $j++)  {
          if($queues[$j][Queue] == $queues[$i][Queue] && $queues[$j][Location])  {
            $active_queues[$queues[$j][Queue]]['members'] = "active";
          }
        }
      }
    }

    while(list($queue_num,$queue) = each($active_queues))  {
      if($queue['members'] == "inactive")  {
        $channel = "Local/*80$page_ext@from-internal";
        echo "auto dialed $channel";
        auto_dial($channel,"from-internal","Queue $queue_num has a caller without an agent");

      }
    }
    sleep(10);
  }
?>

chown asterisk:asterisk /var/lib/asterisk/bin/monitor_queues.php

To run, from the command line: su asterisk -c "php /var/lib/asterisk/bin/monitor_queues.php&"

If you like it, consider contributing to the project that most of the code came from:
http://trixbox.org/forums/vendor-forums-certified/aastra-endpoint...

If you need any further customization, contact me directly to work out a fair deal.

Try this:

<?php
  // The extension to page
  $page_ext = "4002";

  require_once "/var/lib/asterisk/agi-bin/phpagi-asmanager.php";

  $asm = new AGI_AsteriskManager();
  $asm->connect("localhost","admin","amp111");

  function auto_dial($channel,$context,$message)  {
    $call_file = "channel: $channel\n";
    if($retries)  {
      $call_file .= "maxretries: $retries\n";
      if($retrytime)
        $call_file .= "retrytime: $retrytime\n";
    }
    $call_file .= "waittime: 30\n".
                  "application: Flite\n".
                  "data: $message";
    $file = md5(time()).".call";
    file_put_contents("/tmp/$file",$call_file);
    rename("/tmp/$file","/var/spool/asterisk/outgoing/$file");
  }

  function asm_event_queues($e, $parameters, $server, $port)  {
    global $asm;
    global $queue_details;
    if(sizeof($parameters))  {
      if($parameters[Event] = "QueueParams")
        $queue_details[] = $parameters;

    }
  }

  function get_queues()  {
    global $asm;
    $asm->add_event_handler("queueparams","asm_event_queues");
    $asm->add_event_handler("queuestatuscomplete","asm_event_queues");
    $asm->add_event_handler("queuemember","asm_event_queues");

    global $queue_details;
    while(!$queue_details)  {
      $asm->QueueStatus();
    }
    return $queue_details;
  }
  while(1)  {
    $queue_details = array();
    $queues = get_queues();
    $active_queues = array();
    for($i = 0; $i < sizeof($queues); $i++)  {
      if($queues[$i][Calls] > 0)  {
        $active_queues[$queues[$i][Queue]]['members'] = "inactive";
        for($j = 0; $j < sizeof($queues); $j++)  {
          if($queues[$j][Queue] == $queues[$i][Queue] && $queues[$j][Location])  {
            $active_queues[$queues[$j][Queue]]['members'] = "active";
          }
        }
      }
    }

    while(list($queue_num,$queue) = each($active_queues))  {
      if($queue['members'] == "inactive")  {
        $channel = "Local/*80$page_ext@from-internal";
        echo "auto dialed $channel";
        auto_dial($channel,"from-internal","Queue $queue_num has a caller without an agent");

      }
    }
    sleep(10);
  }
?>