Transmit Tx power control and dynamic frequency selection required 80211h

The 802.11a standard was ratified at the same time as 802.11b. However, because of limited supplies of silicon and other components, products did not start to appear in the market until late 2000.

The technology provides up to a 54-Mbps data rate and, in most countries, provides eight channels of indoor WLAN use. However, the regulations vary widely across countries and are subject to change. More channels are expected to become available in many countries.

© 2006 Cisco Systems, Inc. Wireless LANs 6-45

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