What is VoIP and How VoIP works

In this Post, we will discuss in-depth knowledge regarding VoIP and will cover  major topic which includes:

1. What is VoIP and how it works?

2. VoIP history

3. What is VoIP phone system?

4. VoIP business 

5. How VoIP is challenging the telecom operators around the               world?

6. Technology used in VoIP service 

7. Many more including how to set up VoIP by yourself

What is VoIP ?

VoIP stands for Voice over Internet Protocol. It is used to send our voice signals via internet communication method instead of local telephone company. VoIP technology involves sending of analog signals(our talks) by converting into digital discrete signals and transmit the discrete signals in the form of packet data via internet. One of the widely used VoIP example is Skype, Viber, etc. 

How it works different from mobile phone and PSTN ?

In PSTN, our voice is transmitted over copper wire as an analog signals between frequency 0-4KHz. In modern cell phone, the cell phone converts our voice into an electrical signals, which is then transmitted as radio waves with using different modulation technique to secure our privacy. 

But in case of VoIP, the voice signals is converted into packet data, i.e  the voice signals are break down and is changed into the packet data. For this various codec method is used.The packet size is defines by the voice over ip packet structure. For example , if size is 4Kb then we can roughly conclude that our voice signals is converted into 4Kb packet size and send over internet time and again. This process is very fast, which is just a work of fraction of second and we cannot even notice it. 
Now in the other end, the packet data is now decrypted. And the packet data is converted to the standard audio signal. Thus communication is established.

Don't miss the history of VoIP.