[Asterisk-Users] ast_dsp_call_progress

[Jerry Geis]

I am trying to do some software call progress.

Looking through the source I see the function ast_dsp_call_progress, however
it seems like nothing calls it?

How can I take advantage of this existing function? I am not an asterisk 
programmer.

I am using outgoing spool call files on analog lines and wanting to detect
if the call is busy, ringing, answered etc... Right now it is ALWAYS 
answered
and the message I am trying to send to the phone is already started before
the actual phone is answered.

Thanks,

Jerry