Asterisk AMI DTMF

<?php
error_reporting (E_ALL);
set_time_limit(60);
ob_implicit_flush(false);

$ip_asterisk = "127.0.0.1";
$channel = $_GET[c];
$dtmf = $_GET[d];

$oSocket = fsockopen($ip_asterisk, 5038, $errnum, $errdesc) or
die("Connection to host failed");
    fputs($oSocket, "Action: login\r\n");
    fputs($oSocket, "Username: admin\r\n");
    fputs($oSocket, "Secret: 1456\r\n\r\n");
    fputs($oSocket, "Action: PlayDTMF\r\n");
    fputs($oSocket, "Channel: $channel\r\n");
    fputs($oSocket, "Digit: $dtmf\r\n\r\n");
/*
   usleep(500000);
    fputs($oSocket, "Action: PlayDTMF\r\n");
    fputs($oSocket, "Channel: $canal\r\n");
    fputs($oSocket, "Digit: 8\r\n\r\n");
    usleep(500000);
    fputs($oSocket, "Action: Logoff\r\n\r\n");
*/
    // Carga toda la respuesta recibida en un string
    $loaded = "";
    while (!feof($oSocket)){
        $buffer = fgets($oSocket, 4096);
        $loaded .= $buffer;
    }

    $vec = explode("<br>", $loaded);
    $len = count($vec);
    print_r($vec);
?>
http://165.181.11.23/dtmf.php?c=SIP/400-000000df&d=1


http://lists.digium.com/pipermail/asterisk-users/2009-October/238570.html