Rru Power Cable; Rru Alarm Cable - Huawei DBS3900 Hardware Description

DBS3900
RRU3252/RRU3256 Hardware Description

3.3 RRU Power Cable

An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.
Exterior
An RRU power cable has an easy power receptacle (pressfit type) connector at one end and bare
wires at the other end. Proper terminals are added to the bare wires based on the connector on
the external power device, as shown in
The cross-sectional area of an RRU power cable can be either 3.3 mm
(0.008 in.
standards and the latter complies with European standards.
Figure 3-2 RRU power cable
Pin Assignment
The DC power input cable is a two-wire cable.
assignment for the wires of a DC power input cable.
Table 3-2 Pin assignment for the wires of a DC power input cable (North American standards)
Wire
NEG(-)
RTN(+)
Table 3-3 Pin assignment for the wires of a DC power input cable (European standards)
Wire
NEG(-)
RTN(+)

3.4 RRU Alarm Cable

An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to RRUs so that the base station can monitor the operating status of external devices.
Issue Draft A (2012-11-30)
2 2 2
) or 4 mm (0.006 in. )/6 mm
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Copyright © Huawei Technologies Co., Ltd.
Figure 3-2.
2 2
(0.009 in. ). The former complies with North American
Table 3-2 and
Color
Blue
Black
Color
Blue
Brown
3 RRU Cables
2 2
(0.005 in. )/5.3 mm
Table 3-3 describe the pin
2
12