9 GHZ 9–5.0 GHZTABLE 1-2 CLEARLY SHOWS THAT NOT ALL THINGS ARE EQU...

4.9 GHz 4.9–5.0 GHz

Table 1-2 clearly shows that not all things are equal, depending on which country you are in.

In Europe, the 2.4-GHz range and the 5.0-GHz range are used. The 5.0-GHz frequency

ranges that are used in Europe are called the Conference of European Post and Telecommu-

nication (CEPT) A, CEPT B, CEPT C, and CEPT C bands. In the United States, the 900-

MHz, 2.4-GHz ISM, and 5.0-GHz Unlicensed National Information Infrastructure (UNII)

bands are used. Japan has its own ranges in the 2.4- and 5.0-GHz range. The following sec-

tions explain the U.S. frequency bands in more detail.