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3 Board
ID
COM2
IN2
COM3
RX1–4
RXIN1
RX 5–8
RXIN2
3.10 O2TCB
3.10.1 Functions
The O2TCB is the common backplane of the TMU and the TCU. It has the functions of the
CMB backplane and bus drive of the TDU. But the backups of main and extension clocks are
not supported.
Functions of the O2TCB are as follows:
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3.10.2 DIP Switch
Figure 3-25
3-34
Connector
Type
N (Female)
N (Female)
N (Female)
SMA (Female)
SMA (Female)
SMA (Female)
SMA (Female)
The hardware version of the O2TCB described in this section is REV.0.
Only 1PCS TMU is supported.
The TMU, the ABB, and the TCU are inserted into the O2TCB. Their power and other
signals are introduced from the O2TCB.
Supplying DIP switches for the software to identify types of cabinets.
Transferring the clock, data, and control signals of the TMU to the TRX, the CDU, the
PMU, the ABB, and the TCU.
Supplying signal matching for the data bus and the control bus that are between the
TMU and the TRX.
Supplying the transfer of E1 signals for the ABB.
Supplying DIP switches for the software to identify the main and extension cabinets and
the rack number.
Supplying clocks of the combined cabinets for a synchronous cell.
Supplying the OMLs for the cabinets of a combined cabinet group. The main cabinet sets
the CBUS1 bus through the DIP switch.
shows the O2TCB layout.
Huawei Technologies Proprietary
M900/M1800 BTS3X Series Base Transceiver Station
Function
Combiner output 2
Combiner input 1
Combiner output 3
The first RX divider output port 1–4
The first RX divider input port
The second RX divider output port 5–8
The second RX divider input port
Hardware Description Manual
Issue 01 (2006-11-18)
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