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The phone on that small device that you use every day in a variety of purposes without effort or thought If you want to connect to any person in any place in the world you have only to lift your telephone handset and press several buttons to place the conversation that you want. And of course it's fascinating when compared to it once as it was a hundred years before the communications, where he takes a message arrives from one place to another as well as long periods of time should get a reply on what device is this magician, and how does it work?

Telephone service is one of the simplest devices used at home and to imagine how much is simple enough to know that he is still composed of basic parts, which are known since the invention if you have a phone device of the old-twenties of the last century, he would work with no problems if it relates to the current place of your telephone Valhatv In its simplest form consists of:

Ex Switch connected to a network and separated from it, which is commonly known as crossover hook and found to be in touch soon pick up the phone.

Speaker, and is a small headset of any kind.

Microphone and is the place to talk and it was in the old phone equipment is simple to install consists of carbon granules compressed between two sheets of XXXXl passing through an electric current occurs when you talk and sound waves Tdhaguetat Tkhalkhalat in the carbon granules, changing the value of the resistance to the passage of current and thus change the intensity of power output increase and decrease depending on the wave of sound.

This is all something where you can use such a phone if the network arrived to lift the receiver and the key to beating on the crossover depending on the number you want to contact him. This phone was the one problem is that you'll hear your voice through your telephone handset and this causes inconvenience to many people, making it necessary to make some improvements to be installed to allow for more comfort and convenience, where he admitted duplex coil or replaced to conceal the speaker's voice from his ear. It also provided telephones modern keyboard works by simply pressing it instead of beating on the key Siding. Microphones also replaced the old ones by the speakers, and an electronic circuit provided to generate sounds nice instead of the traditional bell, which may be disturbing to become a real new form of the mobile device as shown.

How does the telephone network?

Communications network looks a lot simpler than a phone where you have created your own small network of your own all that between you and the telecommunications company is one of the copper wires and one common stream passes by the magnitude of 30 billion effort to amp teams of 6-12 volts where the microphone to change the intensity of current passing depending on the change of the acoustic wave from your mouth and the speakerphone on the other side to restart the sound wave.

The phone starts from your home, which extend a pair of copper wires of the telephone box on the way to fund the phone in your home and from which it can reach the telephone line to anywhere in the house. Along the road by thick cables stretching more than a hundred pair of copper wires, such as reaching for your home. These cables may be directly related with the function telecommunications company that owns or may relate to known digital concentrator, which converts the sound into a digital signal rate of 8000 samples per second and the power of the analysis of up to 8-bit, where he graduated with special reference voice signals from many voices other and sent all of them through a wire one - often fiber-optic - the Office of the telecom company.