25
DCDU
–48 V input power
Installing the BBU Cables
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Installing the BBU in the RRU3004 Rack
Cable One End Is Connected to... The Other End Is Connected to...
CPRI optical cable The end with the optical cable labels 2A and 2B is
connected to CPRI ports 0 to 5 of the GTMU of the
BBU.
The end with the optical cable labels 1A and
1B is connected to the CPRI_W port of the
cabling cavity of the RRU.
Ground cable for the subrack Ground terminal of the RRU3004 rack Ground bar of the stand
Power cable for the BBU PWR port of the BBU LOAD6 port of the DCDU
E1/T1 cable E1/T1 port of the BBU GEHUB or HUBBTS
Power cable for the DCDU RTN (+) and NEG (-) terminals at the DC input end of
the DCDU
External power supply system
External PGND cable Ground bar of the stand External ground busbar
Equipotential cable for the
subrack
Ground terminal of the RRU3004 rack Ground terminal of the RRU3004 rack
Ground cable for the DCDU Ground terminal of the RRU3004 rack Ground terminal of the DCDU
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