Take as an example a building with a metallic structure. A radio wave will tend to be subject to
many reflections which will consequently degrade system performance.
Moreover, the range of an Alcatel-Lucent 4070 IO/EO is very dependent on the amount of
attenuation subjected to the radio wave across various zones.
The following table gives the values of global coverage zone (cell) for an Alcatel-Lucent 4070
IO/EO under normal environmental and topological conditions:
Interior Exterior
Coverage area ~ 50 m ~ 400 m
Area: ~ 7,000 m
2
~ 50 000 m
2
4.10.1.3 NUMBER OF USERS PER BASE STATION
Type of Base Station connection. Number of DECT users
3 channels 4
6 channels 12
4.10.1.4 LOCATING DECT BASE STATIONS
As a result of the environment and the infrastructure, certain recommendations must be taken
into account for locating Alcatel-Lucent 4070 IO/EO:
Recommendations for location Possible solutions
INTERIOR COV-
ERAGE
As far as possible from walls Suspend Alcatel-Lucent 4070 IO/EO in a
clear zone
Do not fix directly to a metallic structure Move Alcatel-Lucent 4070 IO/EO into an-
other zone
Do not place in false ceilings or in telecom
rooms
Place Alcatel-Lucent 4070 IO/EO in useful
zones (corridors)
As far as possible from industrial machines
or electrical cabinets
Place 4070 IO/EO in useful zones
EXTERNAL COV-
ERAGE
Place the base stations in an open space
(as far as possible from buildings)
Attached to pylons for example
Place the base stations higher than low
obstacles (trees, cars etc.)
At the top of buildings on pylons for ex-
ample
4.10.1.5 INTERACTIONS
Interactions with other features
IBS DECT and IBS PWT (Personal Wireless Telecommunications) cannot run together on the
same system. The first IBS plugged determines the system type (DECT or PWT).
To switch from one system to another, unplug all IBSs, make a warm restart and plug in the
IBSs.
Interactions with other applications
IBSs are fully compatible with other wireless technologies such as VOWLAN.
&'(
4-93
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