4.1.1 2.4GHZ CHANNELS AND FREQUENCIES
802.11b/g/n each support 2.4GHz channels and frequencies. The chart below illustrates “20MHz” wide channels.
802.11n supports “40MHz” wide channels, which would overlap even more and reduce the overall number of
channels available for use.
In the USA, channels 1 – 11 are used. Non-overlapping channels are 1, 6 and 11, as shown in the chart below.
Auto-channel should be selected to ensure that the channel with least interference is used. If manual channel
selection is desired, try selecting a channel with the least interference from other Wireless Access Points.
Note: Via the Web UI, try selecting 40MHz channel width to see which channels are available.
Source: IEEE (note: Only channels 1-11 are used in USA.)
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