CCNA Wireless 640-722 Official Cert Guide

ITU-R

A telecommunications regulatory body regulates or decides which part of the RF spectrum can be used for a particular purpose, in addition to how it can be used. A country might have its own regulatory body that controls RF spectrum use within its borders, but RF signals can be more far-reaching than that. For example, one purpose for shortwave radio stations is to broadcast from one country around the earth to reach other countries. In a similar manner, one radio manufacturer might sell its equipment internationally, where a transmitter or receiver might be used in any global location.

To provide a hierarchy to manage the RF spectrum globally, the United Nations set up the International Telecommunication Union Radiocommunication Sector ...