Global telecommunication. Computer artwork of a hand holding a mobile cellular telephone over a globe and a circuit board,depicting global telecommunication. Battery-powered cellular telephones bypass the standard network of telephone wires,and send their signals by radio which may be relayed via satellite. On a local scale,cellular telephones link up to a grid of local radio communication centres scattered in a network of radio 'cells' | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Victor Habbick Visions |
Bildgröße: | 3219 px × 4257 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |