Requirements For The Rru Cabling On A Tower - Huawei RRU User Manual

RRU
User Guide
l
l
l
Cabling Specifications for E1/T1 Cables
l
l
l
l
l
l
Cabling Specifications for Optical Cables
l
l
l
l
l
l
l
l
l

3.1.4 Requirements for the RRU Cabling on a Tower

This describes the requirements for the RRU cabling on a tower. Routing RRU cables on a tower
should meet certain requirements to prevent damages to the cables or prevent interference to the
signals.
Issue 01 (2008-04-18)
Both ends of the PGND cables are anti-corrosive and antirust. Connections of the PGND
cables are secure.
The low-voltage AC power cable for the NodeB is covered with a metallic conduit and
buried in the ground for at least 50 m before they are led into the equipment room. Note
that if such cables are shorter than 50 m, they must be completely buried in the ground. If
such cables are routed overhead and led into the room, surge protection for the connectors
of the AC power cables are affected.
The PGND cables are buried in the ground or routed indoors. The PGND cables cannot be
routed overhead before they are led into the equipment room.
The optical cables are routed in compliance with the engineering design and general cabling
specifications.
The E1/T1 cables cannot be routed overhead outdoors.
If the E1/T1 cables are routed outdoors, coat the E1/T1 cables with PVC jackets and route
them underground based on the site conditions.
If the E1/T1 cables routed outdoors are longer than 5 m, a surge protection box is required.
The proper cable surpluses are reserved when the E1/T1 cables are curved.
The idle wires of the E1/T1 cables are grounded properly in the equipment room.
The optical cables are routed in compliance with the engineering design and general cabling
specifications.
Reserve proper cable surpluses where the optical cables are curved.
Do not stretch, step, or place heavy objects on the optical cables. Keep the cables away
from sharp objects to avoid damage. The optical cable that is curved or pressed or the optical
connector which is damaged cannot be used.
Extra optical cables are coiled on the specific device such as the fiber coiler. Coil extra
optical cables properly. Do not bend the cables forcibly to avoid damaging the cables.
Use protection tubes to coat the bare fibers.
The idle connectors of the optical cables are covered with dustproof caps.
If one end of the optical cable is connected to an optical device, do not look directly at the
end face of the optical connector. Otherwise, you may damage your eyes.
Fill soft materials such as fireproof cottons in the optical cable inlets at the top of the cabinet
to protect the optical cables.
You need to check whether the optical connectors are clean before installation. If the optical
connectors are dirty, clean them by using the dustfree cloth or fiber cleaner.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
3 Installing RRU and SRXU Hardware
3-13