User guide

TD 92422GB
18 February 2010 / Ver. E
System Planning
Ascom IP-DECT System
11
6.3.2 Lift
If coverage in lifts are desired, locate the base station close to the lift, preferably at the
front in a way that the base station can ‘see’ the front
1
. This is because a lift is usually
surrounded on three sides by a reinforced lift shaft, with the only opening being at the
front. Locating a base station in front of a lift is usually not the most ideal position for the
planning as a whole. It is usually the case that one or more extra base stations will be
required to provide coverage for a lift. The base station will generally also provide
coverage for the storey above and below the floor on which it is installed.
6.3.3 Stairwell
The major problem with stairwells is that they are often sited in a corner of the building.
Coverage is not a problem in itself, but it must be seen in the context of the overall
planning. There are various ways of providing coverage for a stairwell. Either the base
station is installed directly in the stairwell as a dedicated base station for the stairwell, or it
is installed in the close vicinity of a stairwell. The method depends on the type and location
of the stairwell (is it an open or closed stairwell; is it sited in a corner of the building or in
the centre and so on).
6.3.4 Toilet Rooms
Toilet rooms are generally in awkward positions for a site survey: behind or next to lifts, in
or next to stairwells or in a corner of the building. A base station installation in the toilet
room itself can be considered. If placed outside the toilet room it should be placed in the
vicinity of the toilet room in a location where the base station can ‘see’ as much as
possible of the toilet room (preferably the entrance because doors are generally made of
wood and these damp the signal less than the walls).
If the base station is placed in the vicinity of the toilet room, locate it in a way that it
provides coverage for as much of the rest of the floor as possible.
6.3.5 Maintenance Shaft
In larger buildings there is usually the requirement that coverage also be provided in
maintenance rooms. The most common are the rooms for the lift and ventilation system.
The lift maintenance room is often on the roof or in the basement. The ventilation
maintenance room is usually on the roof. Do not omit these rooms they should be
discussed with the client to avoid the client being faced with surprises. A well-positioned
base station on the top floor (20 to 30 metres at most from the room where coverage is
required) usually provides sufficient coverage for the maintenance rooms on the roof.
6.3.6 Basement and Indoor Car Park
It can be difficult to provide sufficient coverage in basements and indoor car parks due to
the usually heavy constructions.
1. ‘see’: there are as few obstacles as possible such as walls etc. between the base station and the lift.