Product Description Part 2

RBS 2207
CDU uses the hybrid combiner in the dTRU. To achieve coverage, the CDU is
used i n a configuration when the hybrid combiner in the dTRU is not used.
Number of units: 1 - 3
DCCU - DC C onnectio n Unit
The DCCU distributes the i
ncoming DC power supply voltages to the PSUs.
The unit also contains DC filter equipment.
Number of units: 0 - 1
dTRU - double Transceiver Unit
The dTR U contains two TRXs for transmission and receptio n of two radio
carriers. It has a built-in combiner with the optional possibility of combining two
TX signals into on e TX output. It is also prepared for four-branch RX diversity,
for further improvemen ts in sensitivity.
Number of units: 1 - 3
DXU-21 - Dis tribution Switch Unit
The D XU is the central control unit for the RBS. It supports the interface to the
BSC, and it collects and transmits 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. It can handle both 2 Mbit (E1) and 1.5 Mbit (T1) PCM
links.
Number of units: 1
FCU - Fan Control Unit
The FCU controls the four fans in the co oling system by regulating fan speed.
The FCU is controlled by the DXU.
Number of units: 1
IDM-02 - Internal Distribution Module
The IDM contains circuit breakers for distribution of the internal +24 V DC
power to the various units.
Number of units: 1
13 (24)
EN/LZT 720 0134 Uen R3A