Avaya Wireless AP-3 User Manual

Avaya Wireless AP-3 User’s Guide                                                                                 1-7

In 1999, the IEEE modified the 802.11 standard to support direct 
sequence devices that can operate at speeds of up to 11 Mbits/sec. The 
IEEE ratified this standard as 802.11b. 802.11b devices are backwards 
compatible with 2.4 GHz 802.11 direct sequence devices (that operate at 
1 or 2 Mbits/sec). Available Frequency Channels vary by regulatory 
domain and/or country. See 

 for details.

Also in 1999, the IEEE modified the 802.11 standard to support devices 
operating in the 5 GHz frequency band. This standard is referred to as 
802.11a. 802.11a devices are not compatible with 2.4 GHz 802.11 or 
802.11b devices. 802.11a radios use a radio technology called 
Orthogonal Frequency Division Multiplexing (OFDM) to achieve data 
rates of up to 54 Mbits/sec. Available Frequency Channels vary by 
regulatory domain and/or country. See 

details. 

In 2003, the IEEE introduced the 802.11g standard. 802.11g devices 
operate in the 2.4 GHz frequency band using OFDM to achieve data rates 
of up to 54 Mbits/sec. In addition, 802.11g devices are backwards 
compatible with 802.11b devices. Available Frequency Channels vary by 
regulatory domain and/or country. See 

details.