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Voip And Its Networking
With VoIP, you can make a call from anywhere you have broadband connectivity. Since the IP phones or ATAs broadcast their info over the Internet, they can be administered by the provider wherever there is a connection. Therefore, business travelers can take their phones or ATAs with them on trips and always have access to their home phone. Another alternative is the softphone. A softphone is client software that loads the VoIP service onto your desktop or laptop. The Vonage softphone has an interface on your screen that looks like a traditional telephone. As long as you have a headset/microphone, you can place calls from your laptop anywhere in the broadband-connected world.
The majority of VoIP companies are offering minute-rate plans structured like cell phone bills. With the elimination of unregulated charges and the suite of free features that are included with these plans, it can be quite a savings. There are also advanced call-filtering options available from some carriers. These features use caller ID information to allow you make a choice about how calls from a particular number are handled.
With many VoIP services, you can also check voicemail via the Web or attach messages to an e-mail that is sent to your computer or handheld. Not all VoIP services offer all of the features above. Prices and services vary so if you are interested, it is best to do a little shopping.
When phones were first developed, up until 1960 or so, every call had to have a dedicated wire stretching from one end of the call to the other for the duration of the call. If you were in New York and you wanted to call Los Angeles, the switches between New York and Los Angeles would connect pieces of copper wire all the way across the United States. You would use all those pieces of wire just for your call for the full ten minutes. You paid a lot for the call, because you actually owned a 3,000-mile-long copper wire for ten minutes.
Telephone conversations over today's traditional phone network are somewhat more efficient and they cost a lot less. Your voice is digitized, and your voice along with thousands of others can be combined onto a single fiber optic cable for much of the journey. These calls are transmitted at a fixed rate of 64 kilobits per second (Kbps) in each direction, for a total transmission rate of 128 Kbps. Since there are 8 kilobits (Kb) in a kilobyte (KB), this translates to a transmission of 16 KB each second the circuit is open, and 960 KB every minute it's open. So in a 10-minute conversation, the total transmission is 9,600 KB, which is roughly equal to 10 megabytes.
In order to understand how VoIP really works and why it is an improvement over the traditional phone system, it helps to understand how a traditional phone system works. Existing phone systems are driven by a very reliable but somewhat inefficient method for connecting calls called circuit switching.
