ETSI
In Europe and several other countries, the European Telecommunication Standards Institute (ETSI; http://www.etsi.org) regulates radio transmitter use. Like the FCC, the ETSI allows wireless LANs to be used in the 2.4-GHz ISM and most of the same 5-GHz U-NII bands; however, the U-NII-3 band is a licensed band and cannot be used.
Table 2-3 lists the transmitter requirements for each of the bands. The ETSI allows adjustments to the transmit power and antenna gain, as long as the maximum EIRP is not exceeded.
Table 2-3 ETSI Requirements in the 2.4- and 5-GHz Bands
The ETSI regulations also include DFS, which requires wireless LAN transmitters ...
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