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And what is the core technology all about?

VoIP Technology

The transmission of voice in all modern telephone networks is digital. As we speak our voice creates a wave in the air, which is continuous, or analog. Computers and networks all operate in a digital mode, which means that the analog signal (your voice) is sampled at very small intervals. This digital representation of your voice is essentially data. So in the same way that your email is sent over the Internet, any data can be sent.

Internet data transmission uses a method (protocol) known as TCP (Transmission Control Protocol). When email is sent or when browser screen is sent this method ensures that all data is received. Breaking data into packets is the fundamental transmission method (IP; Internet Protocol), but TCP includes an error checking and retransmission of data packets so that all data is received. You can see how important this is or your email would be missing leter or wds (sic).

When your voice is sent over the Internet the method is called Voice over Internet Protocol, or VoIP. This is where most descriptions of VoIP begin. The typical short explanation of VoIP is that your voice is divided into "packets" of data; each is transmitted over the Internet to the destination address and there is reassembled into a continuous stream of data just as was originally created at the starting location. This is a correct description of the concept, but you may wish to know more. In that case you have come to the right place.

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