Ericsson RBS 2106 Hardware Reference Manual page 87

RBS 2206
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 also provided with four connections for
transmission lines. It can handle both 2 Mbit (E1) and 1.5 Mbit (T1) PCM links.
The DXU has hardware support for EDGE on 12 TRXs.
Number of units: 1
FCU
The FCU controls the four fans in the cooling system by regulating fan speed.
The FCU is controlled by the DXU.
Number of units: 1
IDM – Internal Distribution Module
The IDM is a panel for distributing the internal +24 V DC power to the various
units. Each distribution circuit in the cabinet is connected to a circuit breaker in
the IDM.
Number of units: 1
PSU – Power Supply Units
The PSUs are available in two versions, PSU AC for connection to AC mains,
or PSU DC for connection to -48 or -60 V DC power supply. The PSU AC
converts 120 - 250 V to regulated +24 V DC. The PSU DC converts -(48 – 60)
V DC to regulated +24 V DC.
Number of units: 0 – 4
DC Filter
The DC filter unit is the interface for +24 V DC power supply or battery back-
up.
Number of units: 1
5.2 Optional Hardware Units
This section describes the optional RBS 2206 Hardware units.
ASU – Antenna Sharing Unit
The ASU is part of co-siting, that is, using another cabinet together with a
GSM RBS 2206 cabinet in the same sector. The ASU allows a TDMA (or
other) cabinet and a GSM RBS 2206 cabinet to share RX antennas.
EN/LZT 720 0225 R3A
Fan Control Unit
–
Radio Base Station
13 (24)