3.9 Connection of DECT Portable Stations
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 "3.9.5 Site Survey Using the
A
B
Gray Zone: Conversation will be intermittent
Radio Signal Strength Levels
ACoverage Area
Radio signal strength level is greater than "3".
(About 50 m to 60 m)
BGood Coverage Area Radio signal strength level is greater than "8". (About 30 m to 40 m) Good sound quality can be maintained.
COut of Service:
Cannot make/receive calls
Level: 00
Level: 01 to 02
Level: 03 to 07
Level: 08 to 10
Level: 11 to 12
Out of range
Receives noise easily or disconnects May receive noise
Good
Better
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 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.
b.If 1 CS cannot cover the entire service area, install additional CSs as required. Overlap the coverage areas of adjacent CSs.
