Some of the items above apply to 802.11b networks but not 802.11a networks, and vice versa.
|
Degree of Attenuation |
|
---|---|---|
Open Space |
None |
Cafeteria, courtyard |
Wood |
Low |
Inner wall, office partition, door, floor |
Plaster |
Low |
Inner wall (old plaster lower than new plaster) |
Synthetic Materials |
Low |
Office partition |
Cinder block |
Low |
Inner wall, outer wall |
Asbestos |
Low |
Ceiling |
Glass |
Low |
Non-tinted window |
Wire Mesh in Glass |
Medium |
Door, partition |
Metal Tinted Glass |
Medium |
Tinted window |
Human Body |
Medium |
Large group of people |
Water |
Medium |
Damp wood, aquarium, organic inventory |
Bricks |
Medium |
Inner wall, outer wall, floor |
Marble |
Medium |
Inner wall, outer wall, floor |
Ceramic (Metal Content or Backing) |
High |
Ceramic tile, ceiling, floor |
Paper |
High |
Roll or stack of paper stock |
Concrete |
High |
Floor, outer wall, support pillar |
Bulletproof Glass |
High |
Security booth |
Silvering |
Very High |
Mirror |
Metal |
Very High |
Desk, office partition, reinforced concrete, elevator shaft, filing cabinet, sprinkler system, ventilator |
If it is absolutely necessary to have a non-dedicated circuit, it is recommended that the circuit not support the following:
The shape of the site is also a concern. RF transmissions propagate differently in a narrow space, such as a hallway, than in a large open area, such as an office filled with cubicles. Open doorways might also affect RF propagation.
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