О. В. Фёдорова е. В. Мезина е. В. Хамис английский язык в сфере информационных технологий и коммуникаций учебное пособие



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ПОСОБИЕ ИИТиК Федорова,Мезина, Хамис 2014

Used frequencies

Physically typical Bluetooth device represents the radio receiver and radio transmitter working on frequencies 2400-2483.5 MHz. These frequencies are chosen not casually, they are open and free from licensing in the majority of the countries of the world. Exceptions make Spain and France. Until recently exceptions make and Japan, hut since October, 1999 there this problem is partially solved, and now Bluetooth devices in Japan can use a complete spectrum of radiofrequencies stipulated by the specifications Bluetooth. Though, some restrictions have remained still in Japan. In Spain the spectrum of radiofrequencies solved for use Bluetooth devices is limited 2445-2475 Mhz, in France this spectrum is limited up to 2446.5-2483.5 MHz. Therefore Bluetooth device developed specially for France, Spam or Japan will not work together with devices developed for all other world. Accordingly, the return statement is correct also. Now members Bluetooth S1G work with authorities of these countries, and there are bases to believe that such situation to not be prolonged.





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