3 RRU Cables. Huawei Technologies QISRRU3952-850M

RRU3952(850M)

Hardware Description 3 RRU Cables

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RRU Cables

About This Chapter

This chapter describes RRU cables.

3.1 RRU Cables

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. The maximum length of an RRU PGND cable is 8 m (26.25 ft).

3.3 RRU Power Cable

The RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. The length of power supply that an RRU power cable supports is 100 m (328.08 ft) by default.

3.4 RRU Alarm Cable

The RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external device to an RRU so that the base station monitors the operating status of external devices. The

RRU alarm cable is 5 m (16.4 ft).

3.5 CPRI Fiber Optic Cable

CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber optic cables. They transmit CPRI signals.

3.6 RRU RF Jumper

The 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna.

A fixed-length RF jumper used by an RRU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m

(19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RRU has a maximum length of 10 m (32.81 ft).

3.7 RRU AISG Multi-Wire Cable

An RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals from a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multi-wire cable transmits RS485 signals. The length of the AISG multi-wire cable is 5 m (16.40

ft).

3.8 RRU AISG Extension Cable

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RRU3952(850M)

Hardware Description 3 RRU Cables

When the distance between an RRU and an RCU is longer than 5 m (16.4 ft), an AISG multiwire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The length of the AISG extension cable is 15 m (49.21 ft).

3.9 Inter-RRU RF Cable

An inter-RRU RF cable connects the RX_IN/OUT ports on two RRUs in the same cell and transmits RF signals between the RRUs. The length of the inter-RRU RF cable is 2 m (6.56 ft).

Issue Draft A (2014-12-31) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

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