Installation Manual
Quidway S3900 Series Ethernet Switches Chapter 2 Preparing for Installation
Huawei Technologies Proprietary
2-3
z Keep the device far from radio transmitting stations, radar stations, and
high-frequency devices.
z Use electromagnetic shielding when necessary, for example, use shielded
interface cables.
z Route interface cables only indoors to prevent signal ports from getting damaged
by overvoltage or overcurrent caused by lightning strikes.
2.2.4 Laser Safety
The S3900 series are class-1 laser devices.
If the extended optical boards on your switch are operating, do not stare into the optical
ports because the laser light emitted by the optical fiber can hurt your retina.
Caution:
Staring into the laser beam produced by the fiber can hurt your eyes.
2.3 Installation Tools
z Flat-blade screwdriver
z Phillips screwdriver
z ESD-preventive wrist strap
Caution:
The installation tools are not provided with the S3900 series.
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