Time management with time attendance machine

Dear experts,

My client is going to record clock-ins and clock-outs for all employee via time attendance machine. So what I need to know is the following.

A. Is the file that I got from the time attendance machine is going to be placed in a certain directory and I am going to setup a program so I can call it from that specific directory or there is an interface program between the time attendance machine and the SAP time management system?

B. In which format that file should be?

C. What is the data needed from the time attendance machine. Is it only going to be the personnel number, clock-in and clock-out? or there is more data needed.

Your help would be highly appreciated.