The RF jumper of the RRU can be categorized into two types: feeder jumper and interconnect
jumper. The interconnect jumper is optional, depending on the site configuration.
2.3.7 Alarm Cable of the RRU
The cable transmits the 2-channel Boolean alarm signals and 1-channel RS485 signals from
external devices to the RRU. Thus, the external signals are monitored.
2.3.1 PGND cable of the RRU
The PGND cable ensures the grounding of the RRU.
Appearance
The green and yellow PGND cable is a single cable with a cross-sectional area of 16 mm
2
. Both
ends of the cable are OT terminals. If you prepare the cable by yourself, it is recommended to
use a copper-based cable with a minimum cross-sectional area of 16 mm
2
.
Figure 2-5 shows the PGND cable.
Figure 2-5 PGND cable
OT terminals need to be added on site. You can determine the color of the cable and whether to
use 2-hole terminals according to local standards.
Figure 2-6 shows the 2-hole terminal.
Figure 2-6 2-hole terminal
Installation Position
One end of the PGND cable is connected to the grounding bolt on the RRU, and the other end
is connected to the nearest grounding bar.
2.3.2 Power Cable of the RRU
The RRU uses a shielded -48 V DC power cable. The cable feeds external -48 V DC power to
the RRU.
Appearance
The cable has two OT terminals at one end and bare wire at the other end, as shown in Figure
2-7.
The OT terminals need to be made on site.
RRU
User Guide 2 RRU and SRXU Hardware
Issue 01 (2008-04-18) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
2-11
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