Huawei DBS3900 Installation Manual page 154

DBS3900 (ICR)
Installation Guide
3.
4.
Figure 15-45 Removing the dustproof caps from the optical cable
Issue 12 (2015-04-30)
NOTICE
l When routing optical cables, coil the cables and place them on the top center of the
upper-level IMB03 to ensure that the holes for heat dissipation are not covered.
l The minimum bending radius of the fiber is 140 mm. When coiling the optical cable,
do not bend it excessively.
Insert optical modules into the CPRI_W/CPRI0/CPRI0/IR0 ports on the RF modules. The
optical modules must be the same as those on the BBU side.
NOTE
l Optical modules with the same labels are of the same type.
l The method of installing the CPRI optical cable for an AC RRU is the same as the method of
installing the CPRI optical cable for a DC RRU. The following figures use the CPRI optical cable
for a DC RRU as an example.
Remove the dustproof caps from the connectors at the end labeled 1A and 1B on the optical
cable, and insert the connectors into the optical module on the RRU.
NOTICE
l When a CPRI optical cable connects a BBU and an RRU, the break-out optical cables
on the BBU side and on the RRU side are 0.34 m (13.39 in.) and 0.03 m (1.18 in.),
respectively.
l If an LC-LC optical cable is used, the TX port on the BBU must be connected to the
RX port on the RF module, and the RX port on the BBU must be connected to the TX
port on the RF module.
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