need to implement auto dialer feature in asp.net

Question

Hi! I need to implement auto dialer feature in asp.net and sql server  For example, the user will:

a. enter to a form call frmDialPhoneNumber
b. search for a Client
c. press a "Dial Client Phone Number"
d. talk with the client
e. Click Hang-Up to terminate call

If u have any idea and any demo of this type project then please send full code of this project , please share with us..........

Thanks,
saroj bhattacharya