ASCOM Ascotel 2025, System Manual

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ascom Ascotel 2025/2045/2065
HBT_20321104_03/B0_en Planning DECT Systems 3.47
5.4.2 Initial rough Determination of the Radio Unit
Locations
Radio circumstances are difficult to estimate. For this reason, situations regarded
as particularly critical need to be determined on site through measurements.
This will provide a reliable idea of the equipment required and the locations for
the radio units.
The following rules of thumb may be of help:
• Good connections still possible in a horizontal direction behind 2...3 ordinary
brick walls; barely any penetration through concrete floors and ceilings in a ver-
tical direction and in ground floor or basement floors, i.e. each storey must be
supplied separately. A certain amount of vertical penetration can be expected
from the first floor upwards; generally speaking, radio propagation conditions
improve as the distance from the ground increases.
• Openings in obstacles improve radio conditions.
• Subsequent furnishing: In empty buildings, the effect of the absence of furni-
ture, machines, partitions, etc., and their room limitation needs to be taken
into account. Subsequent extensions and conversions also have an influence.
• It is important to ensure sufficiently large overlap zones between neighbouring
coverage ranges. The signal should not be too weak that it prevents automatic
handover to the next radio unit. Here, it is necessary to find a solution between
a large number of radio units and a reasonable coverage of the premises.
• Radio range (guideline values)
– Range approx. 30 m in buildings.
– Range up to 250 m.
• Observe the minimum distance of 2 m between radio units (see "Part
4: Installation").