Dell Sonicwall Sonicpoint Ace, Getting Started Manual

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802.11 comparison
chart
The following table compares signal characteristics as they
apply to the current 802.11 standards:
NOTE: Although 802.11b/g/n standards provide between 11
and 14 channels, only three of those channels are fully
discrete (non-overlapping) channels.
For more information on this topic, refer to the
Dell SonicWALL Secure Wireless Networking Integrated
Solutions Guide.
Radio frequency
barriers
Determining the location of RF barriers can be a painful part
of the placement process, but keep in mind that they can be
used beneficially in an attempt to block signals where you do
not want coverage.
The following table lists some common RF barrier types:
802.11a 802.11b 802.11g 802.11n
# of Channels in USA 23 11 11 11
# of Channels in EU 23 13 13 13
# of Channels in
Japan 15 14 14 14
Frequency Band 5GHz 2.4GHz 2.4GHz 2.4/
5GHz
Max. Data Rate 54Mbps 11Mbps 54Mbps 150Mbps
300Mbps
Radius (Range) 90ft/
25m 120ft/
35m 120ft/
35m 300ft/
90m
Barrier Type RF Signal Blocking
Open air Very Low
Glass, drywall, cube partitions Low
Stone floors and walls (brick/marble/
granite) Medium
Concrete, security glass, stacked books/
paper High
Metal, metal mesh (chicken wire), re-
enforced concrete, water Very High
Faraday cage Extremely High
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