Coloured X-ray of a mobile telephone

Coloured X-ray of a mobile telephone

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Caption: Mobile phone. Coloured X-ray of a mobile phone showing various components such as the circuit boards (orange/red, lower frame), the earpiece (blue at upper centre) and the antenna (at upper left). Mobile or cellular phones use low-power radio signals to transmit calls to a base station in the user's local area, or cell. A wide range of frequencies can be used in each cell because the signals are too weak to interfere with those in other cells. Base stations relay calls by cable to switching centres, from where calls can be transferred to other base stations, to the conventional telephone exchange, or to satellite stations for international calls.


Keywords: circuit board, communication, communications, communications technology, mobile, mobile telephone, technological communication, telephon, telephone, x-ray, xray
