Aastra 400 Series User Manual

System characteristics
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Planning Aastra 400 DECT systems as of R1.0
syd-0457/1.0 – R1.0 – 10.2012
Fig. 9 Attenuation of RF signals due to walls, windows, plants
Due to their typical furnishings/fixtures projects in the following environments
must be regarded as critical:
• Garages / repair workshops
•Scrap merchants
• Campsites
• Galvanizing plants
•Metal-working industry
4. 2. 2 Reception conditions
Optimising range is a fundamental challenge of radio technology. The reception of
information in marginal zones is patchy at best. Practical measurements are carried
out on the premises to determine the range.
When instructing users, the following instructions can help to achieve optimum re-
sults:
• You can usually improve the connection quality through minor changes in loca-
tion, e.g. by turning your head or your body.
• Avoid making phone calls in unsuitable places, for example in lifts. Users should
be made aware of these zones during instruction.
30%
10%
1%
0,5%
0,25%
0,01%
100%
5 dB
10 dB
20 dB
23 dB
25 dB
40 dB
Metal-glass façade with triple
glazed windows
Reinforced concrete walls or
ceiling (depending on thickness)
Brick walls with metal-coated double-
glazed windows
Blick walls with standard commercial
windows
Metal façade without windows
Plants, lightweight partitions, wooden
façades with standard commercial windows

Aastra 400 Series Specifications

General

Brand	Aastra
Model	400 Series
Category	Server
Language	English