When the MRFUs work in dual-mode and support three sectors, and the number of DRFUs/
GRFUs is more than three, the UBRI is required. In this case, the CPRI cables are connected in
the manner shown in
Figure 5-70
CPRI cable connections in a co-cabinet base station with MRFUs and DRFUs/
GRFUs
CPRI Cable Connections in the GSM+LTE Base Station
CPRI Cable Connections in the Co-Module GSM+LTE Base Station
The MRFUs working in GSM+LTE mode are connected in the dual-star topology, as shown in
.
5 BTS3900 Cables
BTS3900
Hardware Description
5-48
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Issue 04 (2011-02-15)