Aastra Ascotel IntelliGate 2065 - 5.4.2 Initial rough determination of the radio unit locations

Ascotel IntelliGate 2025/2045/2065
Part 3 Planning DECT systems 625
avoid misunderstandings and can be used as a working paper (e.g. project
progress report) or as specifications to be confirmed by the customer.
Important questions:
• Situation: Where are the calls to be made from – outdoors / indoors?
• Premises: What surface area and what height or depth (storeys, basement
floors) form part of the supply range? Recommendation: Ask for a floor plan.
• Building structure: What sort of materials and types of construction are the
buildings made of? What sort of structural changes are planned for the near
future?
• Subscribers: How many handsets are required? What sort of phoning pattern
do users have? Recommendation: Allocate in user groups.
• Traffic density: How are the handsets distributed throughout the premises and
which users are where?
• Dynamics: How many handsets are expected where and at what times of the
day? Recommendation: Take account of special infrastructure areas such as:
Canteen: 9:00…10:00, meeting rooms.
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.