Atlantis A02-PL303-WN, User Manual

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The range of radio frequencies used by IEEE 802.11g wireless
devices is called a “channel”. Channels available depend on your
geographical area. You may have a choice of channels (for your
region) so you should use a different channel than an adjacent AP
(access point) to reduce interference. Interference occurs when
radio signals from different access points overlap causing
interference and degrading performance.
Adjacent channels partially overlap however. To avoid
interference due to overlap, your AP should be on a channel at
least five channels away from a channel that an adjacent AP is
using. For example, if your region has 11 channels and an
adjacent AP is using channel 1, then you need to select a channel
between 6 or 11.
When Channel bandwith is 40Mhz only 2 AP can works in the
same area without overlapping.
WEP is not completely secure. If possible please use WPA-PSK.