How to call any number by PC

Question

i have dial up modem. bsnl cable,
how i can call any number by pc

Answer 1

You require a VoIP system, should take a look at software called Asterisk if you want to build your own system, but its not a one-night project when you are not used to it. Otherwise just use a paid service like hangouts or skype

Answer 2

what u need is Skype,