[Asterisk-Dev] Digium+asterisk+festival+outgoingcall: How detect a busy line..?

[Daniel Cubero]

Hi all..!!
 
I'm developing a system to use festival,asterisk, digium card. This system makes a auto-dialing (using digium TE410P card), when the customer answer the call: asterisk play an audio (pre-built from festival), that is a easy part. our problem is how we can detect a busy line or error in the line but outside of asterisk (by means of a process to detect status of call-line) then we can make a control and retrying a former error outgoing call. I reviewed Vicidial but it has the same problem (non detect a busy line before transferring the call toward an agent)
 
We are using .CALL file in /var/spool/asterisk/outgoing directory for auto-dialing.

Please, can anybody help us..??
Regards
Daniel
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