WOP-2L. User manual
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3.4 Calculating the number of required access points
Attenuation values
Material
Change of signal level, dB
2.4 GHz
5
GHz
Organic glass
-0,3
-0,9
Brick
-4,5
-14,6
Glass
-0,5
-1,7
Plaster slab
-0,5
-0,8
Wood laminated plastic
-1,6
-1,9
Plywood
-1,9
-1,8
Plaster with wirecloth
-14,8
-13,2
Breezeblock
-7
-11
Metal lattice (mesh 13*6 mm, metal 2mm)
-21
-13
3.5 Channel selection for neighboring access points
It is recommended to set nonoverlapping channels to avoid interchannel interference among neighboring access
points.
Figure 3 – General diagram of frequency channel closure in the range of 2.4 GHz
Example of channel allocation scheme among neighboring access points in frequency range of 2.4 GHz when
channel width is 20 MHz, see Figure 4.
Figure 4 – Scheme of channel allocation among neighboring access points in the frequency range of 2.4 GHz
when channel width is 20 MHz
