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3.2.3
3.3
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stations connected to the same ELU31 board. Thus one MX-ONE cord-
less phone system typically consists of several location areas. Moving
between location areas causes load on the system, and it is very impor-
tant to plan the system in such a way that this kind of load is minimized.
Base stations that cover the same areas shall, when possible, be
connected to the same ELU31 board. In larger areas additional ELU31
boards may be needed, and these shall, when possible, be inserted in
the same Media Gateway as the other boards that cover this area. In a
typical installation, one ELU31 board covers one floor, another ELU31
board covers the next floor and so on.
Larger LA reduce the roaming and hand over events.
Outdoor housing
The outdoor housing is a weatherproof protection case for the following
base stations:
BS330, BS340 and the BS370.
Typical applications are the base station coverage of car parks, large
factory sites and the like to protect the base stations from wind and
weather.
This case can be placed directly against a wall or fixed to a pole. It can
also be used, if base stations must be mounted in-house in areas with
aggressive environment (vapor, gas, liquids) or extreme dusts (industrial
plants).
Consequences of the base station type used
The following three base station types can be used in the cordless phone
system:
•
BS330 base stations with a slightly directional antenna pattern.
This is the preferred base station in most installations, due to
smaller size and lower power consumption.
•
BS340 base station with an omnidirectional antenna pattern (the
same signal strength in all directions). Non-standard antennas can
be used to enlarge the range of a BS340 base station, see chapter
3.5 Non-standard antennas on page 16.
•
The BS370 Wireless Relay Station (WRS) is a base station without
cable connection to the system. The BS370 provides coverage
where cabling is difficult or impossible, for example, in parking
areas. The radio coverage of the BS370 is comparable to the radio
coverage of the BS340.
B
ASE STATION PLANNING
11
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