How does the airborne system prevent mobile phones in use on the aircraft from detecting ground mobile networks?
A29 The airborne system includes two main components which serve to do this. The first, called a picocell, provides mobile services to phones that operate in a supported standard and have a roaming subscription – at a very low power level that prevents interference with the aircraft systems and terrestrial networks. The second component, the onboard channel selector, controls all mobile phones by creating a radio frequency environment, isolating them from outside the cabin – and, therefore, from mobile networks on the ground.
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