SonicWALL SonicPoint-Ne Getting Started Manual page 10

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 tables list some common RF barrier types:
Barrier Type
Open air
Glass, drywall, cube partitions
Stone floors and walls (brick/marble/granite)
Concrete, security glass, stacked books/paper
Metal, metal mesh (chicken wire), re-enforced
concrete, water
Faraday cage
RF Interference
RF interference from home, office, and medical equipment is a
common source of frustration in wireless deployments from the
smallest home office to the largest multi-building campus.
The following table lists several common sources of RF
interference:
Interference Source
RF Signal
Blocking
2.4GHz phones
Very Low
Low
Bluetooth devices
Medium
Microwave oven
High
Scientific and medical
Very High
equipment
Off-network access
Extremely High
points
RF reflective objects
Possible RF
Interference
Entire range (hundreds
of feet)
Within 30 feet
Within 10-20 feet
a
Short distance, varies
Entire range
Long-range wireless
bridging
a. Most newer model microwave ovens have sufficient shielding to
negate possible RF interference.
SonicWALL SonicPoint Getting Started Guide
Band(s)
Affected
802.11b/g/n
802.11b/g/n
802.11b/g/n
802.11b/g/n
All
All
Page 9