Huawei BBU3900 V300 Installation Manual page 19

Installing the BBU in the TMC
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Installing the BBU Cables
DCDU-03B input
power cable
For details on how to install the TMC alarm cable, see page 19.
The DCDU-03B input power cable is connected to the external DC power supply system.
For cable connections of the BBU, see page 7.
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