l Dispose of the used battery according to the instructions provided by the manufacturer.
l Do not dispose of the lithium battery in fire.
1.5 Radiation
Electromagnetic Field Exposure
CAUTION
High power radio-frequency signals are harmful to human body.
Before installing or maintaining an antenna on a steel tower or mast with a large number of
transmitter antennas, the operator should coordinate with all parties to ensure that the transmitter
antennas are shut down.
The base transceiver station (BTS) has RF radiation (radiation hazard). Suggestions for the
installation and operation of BTSs are given in the following section. Operators are also required
to comply with the related local regulations on erecting BTSs.
l The antenna should be located in an area that is inaccessible to the public where the RF
radiation exceeds the stipulated value.
l If the areas where RF radiation exceeds the stipulated value are accessible to workers,
ensure that workers know where these areas are. They can shut down the transmitters before
entering these areas. Such areas may not exist; but if they exist, the areas must be within a
range of less than 10 m around the antennas.
l Each forbidden zone should be indicated by a physical barrier and striking sign to warn the
public or workers.
Laser
CAUTION
When handling optical fibers, do not stand close to, or look into the optical fiber outlet with
unaided eyes.
Laser transceivers or transmitters are used in the optical transmission system and associated test
tools. Because the laser that is transmitted through the optical fiber produces a small beam of
light, it has a very high power density and is invisible to human eyes. If a beam of light enters
the eye, the retina may be damaged.
Normally, staring into the end of an unterminated optical fiber or broken optical fiber with the
unaided eyes from a distance of more than 150 mm (6 inches) will not cause eye injury. Eyes
may, however, be damaged if an optical tool such as a microscope, magnifying glass or eye
loupe is used to stare into the bare optical fiber end.
Read the following guidelines to prevent laser radiation:
1 Safety Information
RRU3804
User Guide
1-8 Huawei Technologies Proprietary Issue 01 (2007-11-29)
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