Most Internet users might have made free phone calls or video chat to another computer using application such as Google Talk. Such calls where two personal computers are at each end are possible by following Voice over Internet Protocol to transfer voice data through internet in terms of packets. By use of a software application customized/developed by your service provider, you can consider your PC as telephone.Although PC to PC calls are free, PC to phone calls are made very cheap with the help of internet compared to normal Phone to Phone calls. You may be puzzled about the reason behind allowing calls between two personal computers for free. One's natural thought would be to think that since we pay our internet provider either monthly or usage based, we tend to think that...