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C
P
ORDLESS
HONE
Media
Gateway
Media
Gateway
Media gateway are connected to different servers.
Or same server with backup server.
3.5
16
Base
station
4
/
Base
station
4
/
Base
station
4
/
Base
station
4
/
Figure 7: Example of a redundancy configuration. ELU31 has 32
B-channel configuration.
Consider also the HLR/ULR configuration also when planing for redun-
dancy. HLR should be placed in the Server that controls the media gate-
ways that particular PP is mostly located. If there are no contact between
HLR and ULR server it will not be possible to call the PP. Also call from
PP and services like hand over can be rejected.
Non-standard antennas
Base stations BS340 and BS370 can be equipped with non-standard
antennas. The non-standard antennas may enlarge the range of a
BS340 and a BS370 base station and reduce the total number of base
stations in a cordless system.
Note: The non-standard antennas for BS370 are used to enlarge the
distance between BS370 and the assigned host base station.
Indoors
The use of non-standard antennas for indoor applications is limited to
specific situations where the radio coverage is the most important factor.
Examples in which non-standard antennas may be used are: large
production halls, long corridors (directional antennas), coverage of bad
radio spots and for expanded base station coverage. When compared to
the standard base station antennas, non-standard antennas are more
expensive, less easy to install and usually larger. These disadvantages
do normally not justify the use of non-standard antennas in an office
environment.
Outdoors
Top floor
Base
station
3
/
3:rd floor
Base
station
3
/
2:nd floor
Base
station
3
/
Ground floor
Base
station
3
/
5/1531-ANF 901 14 Uen D3 2013-11-28
Base
Base
station
station
2
/
Base
Base
station
station
2
/
Base
Base
station
station
2
/
Base
Base
station
station
2
/
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