VoIP (voice over Internet protocol)
What if you can use a software which can bypass carrier of your cellular network and its charges.Make your call with the help of the Internet.It is like you make your calls from your computer which called as voice over Internet protocol.This is also known as digital voice etc.
How voice over Internet protocol works:
Firstly audio is encoded in the data from one side,After this data goes to VoIP PBX(Private branch Exchanger) which switches the call between VoIP and local lines.It converts calls same as PBX do with the telephone calls.Then it decode at the other end where it converts that data to audio.
Some known VoIP
There are many VoIP are there :-
For example, if you've heard of Skype, you've heard of one of the best-known Web-based VoIP services in use. And it's highly popular, with more than 663 million users. Skype itself claims that at some point in March of 2012, more than 35 million people were skyping at the same time.
Skype not only lets you talk, it lets you see the person you called. However, in that case both you (the caller) and your friend (the recipient) have to be using Skype. That's not the case for all VoIP services.
Vonage is another VoIP service that, in their words,
"lets you make U.S. and international calls using your high-speed Internet connection (VoIP) and helps you save money every month with great calling plans.
Conclusion:
If you're bothered by costs for telephone usage, look into a VoIP service. Or if you like the idea of simply making free telephone calls, give it a try.
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