CS Coverage Area
The example below shows the size of the coverage area of 1 CS if it is installed in an area with no obstacles.
Note
Radio signal strength levels are measured during the site survey (refer to "5 Site Survey").
Gray Zone:
Conversation will be
intermittent
Coverage Area
Radio signal strength level is
greater than "3".
(About 50 m to 60 m
[164 ft to 197 ft])
Good Coverage Area
Radio signal strength
level is greater than "8".
(About 30 m to 40 m
[98 ft to 131 ft])
Good sound quality
can be maintained.
Out of Service:
Cannot make/receive calls
A
B
A
B
Radio Signal Strength Levels
C
Better
Good
May receive noise
Receives noise easily or disconnects
Out of range
Level: 11 to 12
Level: 08 to 10
Level: 03 to 07
Level: 01 to 02
Level: 00
Site Survey Preparation
1.
Obtain a map and investigate the installation site.
a.
Check the obstacles (e.g., shelves, columns, and partitions).
b.
Check the materials of the structures (e.g., metal, concrete, and plywood).
c.
Check the layout and dimensions of the room, corridor, etc.
d.
Write down the above information on the map.
2.
Examine the service area required by the user on the map, referring to the following example.
a.
Draw the coverage area around a CS. Extend the coverage area 30 m to 60 m (98 ft to 197 ft) in each
direction, depending on the materials of the building structures and obstacles in the installation site.
Note that a CS cannot be installed outside a building.
Document Version 2009-12
Quick Installation Guide
13
3 Site Planning
