Huawei BBU3900, Описание аппаратуры

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optical cable is required. When the distance between the BBU and the RRU is longer than 100
m, a single-mode optical cable is required. A single-mode optical cable connects the BBU to the
ODF and the ODF to the RRU to transmit CPRI signals.
A multi-mode optical cable is a multi-mode cable with a DLC connector at each end. Figure
4-13 shows the multi-mode optical cable.
Figure 4-13 Multi-mode optical cable
(1) DLC connector (2) Branch cable (3) Label on the branch cable
Figure 4-14 shows the connections of the CPRI optical fiber between the BBU and the RRU
when the multi-mode CPRI optical fiber is used.
Figure 4-14 The connections of the multi-mode CPRI optical fiber
(1) Multi-mode CPRI optical fiber
When a multi-mode optical cable is used for connection between the BBU and RRU, the branch
cables on the BBU side and RRU side are 0.34 m and 0.03 m long respectively. When a multi-
mode optical cable is used for connection between RRUs, the branch cables on both RRU sides
are 0.03 m long.
A single-mode optical cable has a DLC connector at one end and two FC connectors at the other
end, as shown in
Figure 4-15 .
BBU3900
Hardware Description
4 BBU3900 Cables
Issue 11 (2010-11-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-15