D-Link DSL-G604T User Manual page 14

DSL-G604T 54Mbps Wireless ADSL2/2+ Modem/Router Manual
802.11g is an extension to 802.11b, the basis of many wireless LANs in existence today. 802.11g will
broaden 802.11b's data rates to 54 Mbps within the 2.4 GHz band using OFDM (orthogonal frequency
division multiplexing) technology. Because of backward compatibility, an 802.11b radio card will
interface directly with an 802.11g access point (and vice versa) at 11 Mbps or lower depending on
range. You should be able to upgrade the newer 802.11b access points to be 802.11g compliant via
relatively easy firmware upgrades.
Similar to 802.11b, 802.11g operates in the 2.4GHz band, and the transmitted signal uses
approximately 30MHz, which is one third of the band. This limits the number of non-overlapping
802.11g access points to three, which is the same as 802.11b.
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