Record During Dial()

record (monitor to a file) the inbound audio of incoming calls up until the point that those calls are answered. In other words, only record up until the point the dial() command finishes executing and a call is either connected/bridged or sent somewhere else (like voicemail).

 The dial() command should look something like this:

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exten => 300,n,Dial(SIP/110,30,itTm(stdmusic)M(answered^${CHANNEL}))

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 The macro should look something like this:

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[macro-answered]
exten => s,1,AGI(stop_monitor.agi,${ARG1})

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 The stop_monitor.agi script should look something like this:

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#!/usr/bin/php -q
<?php
$channel = $argv[1];
$socket = fsockopen("localhost","5038", $errno, $errstr, 2);
fputs($socket, "Action: Login\r\n");
fputs($socket, "UserName: <AMI username>\r\n");
fputs($socket, "Secret: <AMI password>\r\n\r\n");

fputs($socket, "Action: StopMonitor\r\n");
fputs($socket, "Channel: $channel\r\n\r\n");
fputs($socket, "Action: Logoff\r\n\r\n");
$wrets=fgets($socket,128);

while (!feof($socket)) { $wrets .= fread($socket, 8192); }
fclose($socket);
?>

https://community.asterisk.org/t/record-during-dial-unusual-problem-requires-creative-solution/65974