Cpri Fiber Optic Cable - Huawei DBS3900 Hardware Description

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DBS3900

RRU3253 Hardware Description

Table 3-3 Pin assignment for the wires of a DC power input cable (European standards)

Wire

NEG(-)

RTN(+)

3.4 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.

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 3-3

DLC connector at each end.

Figure 3-3 Fiber optical cable between a BBU and an RRU or between RRUs

(1) DLC connector

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 3-4

Issue 01 (2012-11-30)

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.

shows a fiber optic cable between a BBU and an RRU or between RRUs, with a

(2) Branch optical fiber

shows the connections for a CPRI fiber optic cable between a BBU and an RRU.

Huawei Proprietary and Confidential

Color

Blue

Brown

(3) Label on the branch optical fiber

3 RRU Cables

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