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[Synopsis] Executes AGI on a hungup channel [Description] [E|Dead|X]AGI(command|args): Executes an Asterisk Gateway Interface compliant program on a channel. AGI allows Asterisk to launch external programs written in any language to control a telephony channel, play audio, read DTMF digits, etc. by communicating with the AGI protocol on stdin and stdout. This channel will stop dialplan execution on hangup inside of this application, except when using DeadAGI. Otherwise, dialplan execution will continue normally. A locally executed AGI script will receive SIGHUP on hangup from the channel except when using DeadAGI. This can be disabled by setting the AGISIGHUP channel variable to "no" before executing the AGI application. Using 'EAGI' provides enhanced AGI, with incoming audio available out of band on file descriptor 3 Using 'XAGI' provides enhanced AGI, with incoming audio available out of band on file descriptor 3 and outgoing audio available out of band on file descriptor 4 Use the CLI command 'agi show' to list available agi commands This application sets the following channel variable upon completion: AGISTATUS The status of the attempt to the run the AGI script text string, one of SUCCESS | FAILURE | HANGUP