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December 22, 2005
3. Building materials can make all the difference. For example, solid metal doors or aluminum wall studs may
adversely effect wireless signals. Try to position wireless client devices so that the signal passes through
drywall (between studs) or open doorways and not other materials.
Coverage and Capacity Planning
This section considers coverage and capacity for your deployment(s), including placement options, RF patterns and
cell sizes, area calculations, roaming considerations, and channel allocations.
Placement
Use the following guidelines when considering placement options:
1. The best placement option for the Array is ceiling-mounted within an open plan environment (cubicles rather
than fixed walls).
2. Keep the Array away from electrical devices or appliances that generate RF noise. Because the Array is
generally mounted on ceilings, be aware of its position relative to lighting (especially fluorescent lighting)—
we recommend maintaining a distance of at least 3 to 6 feet (or 1 to 2 meters).
3. If using multiple Arrays at the same location, we recommend maintaining a distance of at least 100 feet
between units.
≥
100 ft
AIWS-UM-4003-01
90°
45°
1.5 feet
Figure 2-1. Wall Thickness Considerations
Figure 2-2. Unit Placement
2°
< 3 feet
Chapter 2: Installation
> 42 feet
≥
100 ft
≥
100 ft
2-3
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