Ericsson RBS 2106 Reference Manual page 90

Product Data RBS 2106
ACCU
ADM
ASU
BFU
CDU
CXU
DF
DXU
dTRU
FCU
IDM
OXU
PSU
TM
TMA-CM
5.2.1 Cabinet Hardware: Basic Units
The functions of specific units of the RBS 2106 are described briefly
here.
Distribution Switch Unit (DXU)
The DXU is the central control unit for the RBS. It supports the
interface to the BSC, and it collects and transmits the alarms. The DXU
controls the power and climate equipment for the RBS. It has a
removable compact flashcard which makes it possible to replace a faulty
DXU without the need for loading RBS software from the BSC.
The DXU is provided with four connections for transmission lines. It
can handle 2 Mbit (E1) or 1.5 Mbit (T1) PCM links.
The DXU has hardware support for EDGE on 12 TRXs.
Combining and Distribution Unit (CDU)
The CDU is the interface between the transceivers and the antenna
system. All signals are filtered before transmission and after reception
by means of bandpass filters. The CDU allows several dTRUs to share
antennas. There are a maximum of three CDUs in one RBS 2106.
The task of the CDU is to combine transmitted signals from several
transceivers, and to distribute received signal to several transceivers.
The CDU is hardware-prepared to support EDGE.
Two different CDU types are used in RBS 2106 to support all the
configurations.
CDU-F is a filter combiner intended for high capacity solutions. It can
handle up to four transceivers on two antennas. One-, two- and three-
sector configurations are possible in one cabinet with only two antennas
88 (485)
AC Connection Unit
Auxiliary Distribution Module
Antenna Sharing Unit
Battery Fuse Unit
Combining and Distribution Unit
Configuration Switch Unit
Distribution Frame
Distribution Switch Unit
Double Transceiver Unit
Fan Control Unit
Internal Distribution Module
Optional Expansion Unit
Power Supply Unit
Transport Module
Tower-Mounted Amplifier Control Module
© Ericsson Radio Systems AB
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EN/LZT 720 0008 P2A
2001-11-28