Interfacing to a Keypad?

I want to do a IVRS project where the caller can access student info(like student marks, attendence....) thru phone. As far as i understand there 3 tasks my program shud be able to do:
1) able to read the input from keypad to phone(dunno how to do)
2) then connect to database and get required info(thru jdbc i suppose)
3) convert the req result to speech n pass it on to caller(thru speech n sound API's)
First of all, am i missing anything?
Secondly, how to go abt the first task: input frm keypad of phone?
Please help.

I hope this can be done through communication port in your system with the telephone.
You can refer classes and methods of javax.comm package
http://java.sun.com/products/javacomm/reference/api/javax/comm/package-summary.html

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