3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
NOTE
l An ODF can be used when the distance between a BBU and an RRU or the distance between
interconnected RRUs is longer than 100 m (328.08 ft).
l A single-mode fiber optic cable connects a BBU to an ODF or connects an ODF to an RRU.
The maximum length of a CPRI fiber optic cable is 150 m (492.12 ft) When the fiber optical
cable connects a BBU and an RRU. The length of a CPRI fiber optic cable is 10 m (32.81 ft)
when the fiber optical cable connects two RRUs.
Exterior
Figure 3-4 shows a fiber optic cable between a BBU and an RRU or between RRUs, with a
DLC connector at each end.
Figure 3-4 Fiber optical cable between a BBU and an RRU or between RRUs
(1) DLC connector
(2) Branch optical fiber (3) Label on the branch optical fiber
When a fiber optical cable connects a BBU and an RRU, the optical fibers on the BBU side and
RRU side are 0.34 m (0.013 in.) and 0.03 m (0.0012 in.) long, respectively. When a fiber optical
cable connects two RRUs, the optical fibers on both RRU sides are 0.03 m (0.0012 in.) long.
Figure 3-5 shows the connections for a CPRI fiber optic cable between a BBU and an RRU.
DBS3900
RRU3252/RRU3256 Hardware Description 3 RRU Cables
Issue Draft A (2012-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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