asterisk users - Mar 2006 - [HELP] dial plan continue for outbound channel on disconnect

Does anyone know if there is a way to continue in the dial plan for the
called (outbound) channel if the caller channel disconnects?  Something
like this:


*************************************
[call_client]
exten => _9NXXXXXX,1,Dial(${TRUNK}/${EXTEN:1},30,g)
exten => _9NXXXXXX,2,Playback(some_file)
exten => _9NXXXXXX,3,Hangup
*************************************

I am trying to do a auto call routing from an applications with out having
to determine the channel inuse and using a AMI redirect or a dtmf transfer
code.

Anyone have any experience with this or is there an better/easier way to
accomplish this.