The challenge and the solution approach
according to ANSI C63.27

Whether at work, at home, or during leisure time, devices with wireless technologies are used in virtually all of our lives – often more than one within the operating environment. Despite prior testing and market approval of the products, the use of common frequency bands can affect the functionality of the equipment. This can be prevented with the help of a testing standard from the American National Standards Institute: ANSI C63.27.

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