Ericsson RBS 2106 Hardware Reference Manual page 88

Radio Base Station RBS 2206
Number of units: 0 – 1
Bias injector
The bias injector is used to provide the ddTMA with DC power, from the
TMA-CM, over the RX/TX feeder cables. Six bias injectors can be connected
to one TMA-CM. The BIAS-IC is mounted outside the cabinet, as close to the
RF output as possible.
Number of units: 0 – 6
BBS
The RBS 2206 can be provided with battery back-up from an external cabinet,
either a BBS 2000 or a BBS 2202.
ddTMA – dual duplex Tower Mounted Amplifier
The ddTMA is to be mast-mounted and placed close to the antenna. It
improves the receiver sensitivity. The ddTMA saves feeder cables by
duplexing RX and TX signals to the same cable.
Number of units: 0 – 6
DXX – Digital Cross Connector
A 1 or 2-card DXX plug-in unit that is a digital cross-connector. The one card
version has four G.703/G.704 ports. The 2-card version has four G.703/G.704
ports and one slot for two to four additional interfaces that can be G.703/G.704
ports, HDSL, LTE or optical fibre. It is installed in the OXU.
Number of units: 0 – 1
Mini-DXC
A cross-connect unit that provides five G.703/G.704 ports. It is installed in the
OXU.
Number of units: 0 – 1
OXU – Optional Expansion Unit
There are four positions available for optional RUs in the DXU/PSU subrack,
for example for TMA-CM and DXX. One 19-inch OXU-position is also
available between the CXU and the dTRU subrack.
Number of units: 0 – 1
14 (24) EN/LZT 720 0225 R3A