Asterisk agi

Overview

AGI(Asterisk Gateway Interface) 내용 정리.

Basic

Process Based AGI

Process-based AGI is the simplest variant of AGI. The script is invoked using the AGI() application from the Asterisk dialplan. The application to run is specified as the first argument to AGI(). Unless a full path is specified, the application is expected to exist in the /var/lib/asterisk/agi-bin directory. Arguments to be passed to the given AGI application can be specified as additional arguments to the AGI() application in the Asterisk dialplan.

EAGI

EAGI(Enhanced AGI) is a slight variant on AGI(). It is invoked in the Asterisk dialplan as EAGI(). The difference is that in addtion to the communication on stdin and stdout, Asterisk also provides a unidirectional stream of audio coming from the channel on file descriptor 3.

DeadAGI

It's dead. Should not use this one.

FastAGI

FastAGI is the term used for AGI call control over a TCP connection. With process-based AGI, an instance of an AGI application is executed on the system for every call, and communication with that application is done over stdin and stdout. With FastAGI, a TCP connection is made to a FastAGI server. Call control is done using the same AGI protocol, but the communication is over the TCP conection and does not require a new process to be started for every call.