做个标记

Asterisk AGI

AGI 必须放在 dialplan 里面的。
    *  AGI may control the dial plan, called in extensions.conf.
    * Async AGI Introduced in Asterisk 1.6, allows asynchronous AGI scripting.
    * EAGI gives the application the possibility to access and control the sound channel in addition to interaction with the dial

Asterisk FastAGI

通过 tcp/ip 访问其他的服务器。
    * FastAGI can be used to do the processing on a remote machine via a network connection.
    * DeadAGI gives access to a dead channel, after hangup. Deprecated since Asterisk 1.6

fastAGI: exten => 5551212,1,AGI(agi://192.168.0.2)

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