How does the phone work?
Mobile phone is an integral partmodern, technologically advanced society. Despite the routine and external simplicity of this device, very few people know how a mobile phone works.
Mobile Phone Device
Modern technology and constantly movingForward progress allows you to create phones with a huge number of functions and capabilities. With each new model, phones are becoming thinner, more beautiful and more affordable in finance. Despite a huge variety of models and manufacturers, all these devices are arranged according to one principle.
In fact, a mobile phone isReceiver-transmitter, which in its case has a receiver, transmitter and radio antenna. The receiver provides reception of the radio signal, converts it into electrical impulses and sends it to the speaker of your phone in the form of electric waves. The speaker converts these electrical impulses into a sound that we hear when we talk with the other person.
The microphone perceives your speech, converts it intoelectrical signals and sends to the built-in transmitter. The task of the transmitter is to convert electrical pulses into radio waves and transmit to the nearest station via an antenna. The antenna serves to amplify the reception and transmission of radio waves from the phone to the nearest cellular communication station.
How does a landline phone work?
The device of a stationary phone is not strongdiffers from mobile. In a fixed telephone, there is no need to convert electrical pulses into radio waves, since contact with the subscriber is via a telephone cable through the Automatic Telephone Station (PBX). The station does not need to search the device for its own area of operation and when dialing the number, it automatically connects you to the telephone to which this number is registered.
How does mobile communication work?
Each of us has the ability to visuallyTo observe a large number of radio towers located in different parts of the city. These towers, as a rule, are installed at the most elevated places, on the roofs of high-rise buildings, on the constructions of other communications or on their own stationary towers. These radio towers are called base stations (BS). You can notice that in cities such stations are installed much more often than in long-distance space. This is due to the fact that in urban conditions, there are many natural disturbances in the form of concrete buildings and various metal structures, which significantly degrade signal quality. At the same time, a larger number of subscribers are concentrated in the cities, which create a heavy load on the cellular network, and to maintain a good quality of communication, a strengthening of the coverage area is required.
Your phone has its own identification inthe mobile number of your SIM card. In the on state, the mobile phone constantly scans the space in search of the network and automatically selects the Base station, which provides the best signal quality. At the same time, he informs the station about his location and status, so the central computer of the mobile operator always knows in which area of the base station the phone is located and is ready to receive the call signal. As soon as the other subscriber calls your number, the computer detects your location and sends a call signal to your phone. If the phone is turned off or is not in the range of the nearest Base Station, the computer informs you that the subscriber is out of coverage and can not receive the call.
