Toshiba Strata AirLink Installation Manual page 17

Table 2 shows attenuation obstruction caused by common materials in a building.
Table 2 Signal Attenuation Obstruction
➤ To reduce or eliminate attenuation and fading
1. Begin the signal path without obstructions even
though signals can travel through obstacles (see
Figure 4).
2. If obstructions cannot be avoided, do not place
the Base Stations:
o On or near metallic objects or on walls that
have metallic content such as metal girders
or foil-backed insulation.
o Near large obstructions; for example, doors
that could temporarily obstruct antennas
when the doors open.
3. Place components in locations that ensure clear
line of sight signaling between the Base Station
and handset.
Note In general, for optimum coverage and reduced signal fading, it is recommended that the
coverage by the Base Station overlap by approximately 25 percent. Base Stations are
designed to automatically use frequencies that are not already in use, so interference
between the Base Stations is not a problem.
4. Plan coverage for each floor separately in multi-story environments. A single Base Station can
support multiple floors. The guidelines for ensuring proper broadcast ranges and maximum
traffic must be followed.
5. Consider the high traffic areas and install the number of Base Stations required to meet the
estimated traffic demand. When multiple Base Stations are needed in the same location, you
can mount Base Stations as close as one meter apart.
Strata AirLink Installation Guide
Object
Concrete
Concrete with metal siding
Brick
Plaster
Walls with windows
Walls with metal coating
Venetian blinds
Open
Closed
Soft partitioning
5/00
Step 2: Review System Component Placement
Approximate
dB Loss
20
30
15
10
10
20
10
20
3 to 4
Base Station
Figure 4 Maximum Line of Sight
Pre-installation
2975
Corridor
7