User guide

TD 92422GB
18 February 2010 / Ver. E
System Planning
Ascom IP-DECT System
10
Figure 2. Base station covering two floors
6.2.3 Fire-resistant walls/doors
The same facts applies for fire walls as for normal walls mentioned in the section above.
However, fire doors are usually open during the site survey, it is important to close the fire
doors before doing the final site survey measurement and before finalising the base
station plan. Should a fire break out and the doors then be closed, there must of course
still be sufficient coverage.
6.3 Special Areas
This section describes a number of special areas which must be considered when doing a
base station planning, and how to ensure full DECT coverage in these areas.
6.3.1 Outdoors/car park
Coverage outdoors is usually not a problem since there are few or no obstacles. The base
station location depends on the client and on the size of the area to be covered. If the
client wishes to have as few base stations as possible installed outside (because of the
costs of the outdoor housing), it is possible to install one or more base stations with the
antennas in front of a window.
The base station must be able to ‘see’ as much as possible of the outdoor area to be
covered (that is, there must be as few obstacles as possible between the base station and
the covered area). Ensure that a measurement is carried out in order to check how much
coverage a base station provides to the outdoor area, the intention is not to install all the
base stations in front of windows, since this is not the ideally position to provide indoor
coverage (normally 1-2 base stations are sufficient).
Type of glass Range in
metres
Normal glass 150-300
Surface coated
float glass
30-50
Wired glass
(fine-mesh)
0-20
007
2nd floor
1st floor
Open stairwell
or atrium