Last month, the FCC officially opened up the use of the middle band of
the Unlicensed National Information Infrastructure (UNII) spectrum
(5.470 GHz to 5.725 GHz) to 54Mbps 802.11a Wi-Fi networks in the United
States. The band adds another 255 MHz and 11 channels to the existing
325 MHz and 13 channels available for Wi-Fi in this band.
As of January 20, any products that apply for certification in the 5.470
GHz to 5.725 GHz band or in the lower end of the UNII band at 5.25
GHz to 5.35 GHz, were required to support dynamic frequency selection
(DFS) and transmit power control (TPC) to minimize interference, per a
February 2005 FCC order
<http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-05-43A1.pdf>.
From Joanie Wexler...
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