Metal Halls - Avaya DECT R4 Installation And Administration Manual

Basement and indoor car park
Providing sufficient coverage in basements and indoor car parks is difficult due to the usually
heavy construction in these areas.

Metal halls

Providing coverage in a metal hall such as a production hall or storage building requires
attention to the dimensions of the hall and the material used in the roof, floor, and walls. For
example, metal, concrete, or brick. While every hall is different and predicting the radio
reception is difficult, you must check whether:
The roof is reflective.
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The hall has many objects.
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The objects in the hall are stationary or constantly moving.
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Poor speech quality in a metal hall can be due to time delay spread or the actuation of the soft
suppressor or both. Both are explained in greater detail in the following topic.
Time delay spread
Radio signals can travel by various paths to reach the user, either directly but through
reflections. This feature is called Time delay spread. For a graphic representation of Time delay
spread, see the following figure:
Figure 11: Time delay spread
A
Avaya DECT R4 - Installation and Maintenance Guide
Reflecting wall
2
1
2
B
Base station coverage
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02/2016