How does the phone?
mobile phone is an integral part of a modern, technologically advanced society.Despite the apparent simplicity and ordinariness of this device, very few people know how the mobile phone.
mobile phone device
Modern technology and constantly moving forward progress allow to create phones with lots of features and capabilities.With each new model phones are becoming thinner, prettier and more accessible for Finance.Despite the huge variety of models and manufacturers, all of these devices are arranged on one principle.
In fact, a mobile phone - it is receiving-transmitting device, which in his case has a receiver, a transmitter and a radio antenna.The receiver provides reception of a radio signal, converts it into electrical impulses and sends to a speaker of your phone in the form of electric waves.The speaker converts the electrical impulses in the sound that we hear in conversation with someone.
microphone picks up your voice, converts it into electrical signals and sends a built-in transmitter.The task of the transmitter to convert electrical impulses into radio waves and transmitted to the nearest station by the antenna.The antenna is used to enhance the transmission and reception of radio waves from the phone to the nearest station of cellular communication.
How does phone landline
landline phone device is not much different from the mobile.The desk phone is not necessary to convert the radio waves into electrical impulses, because contact with the party going on the telephone cable through automatic telephone exchange (PBX).The station does not need to find the device on the zone of its action, and when dialing it automatically connects you to the telephone to which that number is registered.
How does mobile telephony?
Each of us has the ability to visually observe a large number of radio towers, located in different parts of the city.These towers are usually installed on the most elevated places on the roofs of high-rise buildings on the constructions or other communications on their own stationary rigs.These radio towers called base stations (BS).You may notice that in cities such stations are installed much more frequently than long-distance space.This is due to the fact that in an urban environment, there are many natural interference as concrete buildings and different metal structures, which significantly degrade the signal quality.At the same time in cities focused more subscribers that create heavy load on the cellular network and to maintain good communication quality enhancement of coverage required.
Your phone has its own identity as a mobile phone number on your SIM card.In the switched state, the mobile phone scans the space constantly in search of the network, and automatically selects the base station that provides the best signal quality.At the same time he informs the station about its location and condition, so the central computer mobile operator always knows within range of a base station and the phone is ready to take if he call signal.As soon as the other party makes a call to your room, the computer determines your location and sends a ringing tone to your phone.If the phone is turned off or is not in range of the nearest base station, the computer tells you that you are outside the coverage area and can not receive calls.