On a Quest for Voice Responce Info

I am looking at developing a Voice Responce System that can be used by callers who supply required info. As an example, once they log in with their user ID's and passwords, allow options to check order numbers to see if they are being processed, allow to check payment status, etc. I'm a basic VB programmer working mostly with ADO/DAO so putting all the into together isn't the problem - connecting to telephone and allowing automated access is! I'm sure this is someway possible - can someone point me in the right direction. Please and thank you in advance.