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Glass, metal reinforced grid
Glass, metal clad sunguard
Wall, indoor, plaster, wood
Wall, brick, 10 cm
Wall concrete, 10 cm
Wall concrete, 15 cm
Wall concrete, 20 cm, large windows
Wall concrete, 40 cm
Ceiling, concrete, reinforced, tiles
With the DECT equipment, the available link budget is 38 dB. This is the maximum allowed
loss in the link, under constraints of excellent and good speech quality and the ability for the
user to move.
To calculate the distance between DAP and handset, use the information in
range calculation chart
Using the building map, start at the possible DAP location. Move away from the DAP location.
Calculate the distance. When you encounter an obstacle, calculate the insertion loss. Using
the chart below, start in the lower left corner (0,0), move horizontally, to the value for the actual
distance. Move vertically to the value for the insertion loss of the encountered obstacle. If the
curve in the chart is crossed, read the maximum distance for that specific DAP in that situation.
This gives the cell size in that specific direction. Ensure that outside the calculated range
communication is possible but a good voice quality is no longer guaranteed.
SIP DECT Fundamentals
Material
on page 38.
Insertion loss (dB)
10
10
2
3.5
6
9
6
17
17-20
October 2012
Site planning
Figure 11: DECT
37
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