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Chapter
8
8.10.1.2 Number of useful base stations
Any radio signal is subject to various propagation phenomena: attenuation, reflection and diffraction.
These phenomena are related to the environment of the Alcatel-Lucent 4070 IO/EO, and affect the
radio performance of the system.
The effects can improve or deteriorate wave propagation.
Take as an example a building with a metallic structure. A radio wave will tend to be subject to many
reflections which will consequently degrade system performance.
Moreover, the range of an Alcatel-Lucent 4070 IO/EO is very dependent on the amount of attenuation
subjected to the radio wave across various zones.
The following table gives the values of global coverage zone (cell) for an Alcatel-Lucent 4070 IO/EO
under normal environmental and topological conditions:
Coverage area
Area:
8.10.1.3 Number of users per base station
Type of Base Station connection.
3 channels
6 channels
8.10.1.4 Locating DECT base stations
As a result of the environment and the infrastructure, certain recommendations must be taken into
account for locating Alcatel-Lucent 4070 IO/EO:
8AL91217USAA - Ed. 01 - July 2018 - Installation Manual
Device commissioning
1 : L1
UAI-3
2 : L2
3 : L1
Distribution panel
UAI-4
4 : L2
4
1
Screw terminal block
Interior
~ 50 m
2
~ 7,000 m
Number of DECT users
UAI
DIGITAL INTERFACES
16
9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8
Exterior
~ 400 m
2
~ 50 000 m
4
12
157/216
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