Huawei BBU3900 V300 - Page 23

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Install the monitoring signal cable between the PMU and the BBU.
Connect one end of the cable to the MON port on the BBU and the other
end to the RS232/RS422 port on the PMU.
Monitoring
signal cable
between the
PMU and the
BBU
RS232/RS422 port
Installing the BBU in the PS4890 Cabinet
Installing the BBU Cables
c