Rru Cables - Huawei DBS3900 Hardware Description

DBS3900
RRU3252/RRU3256 Hardware Description
About This Chapter
This chapter describes RRU cables.
3.1 RRU Cable List
This section describes RRU cable connections.
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU.
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.
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.
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.
3.6 RGPS Jumper
A PGPS jumper connects a RGPS antenna to an RRU.
3.7 SFP High-Speed Cable for Cascaded RRUs
This section describes the SFP high-speed cable for cascaded RRUs. An SFP high-speed cable
for cascaded RRUs connects common public radio interface (CPRI) ports between two RRUs
and transmits CPRI signals between RRUs. SFP is short for small form-factor pluggable while
RRU is short for remote radio unit.
3.8 RRU RF Jumper
A 1/2" RRU RF jumper transmits and receives RF signals.
3.9 RRU AISG Multi-Wire Cable
This section describes a remote radio unit (RRU) AISG multi-wire cable with the length of 5 m.
It connects an RRU and a remote control unit (RCU) to transmit control signals from an eNodeB
to the remote electrical tilt (RET) antenna. When the RRU is connected to the RET antenna, an
AISG multi-wire cable transmits RS485 signals.
Issue Draft A (2012-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
3

RRU Cables

3 RRU Cables
8