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Electrical safety
• Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, or missing safety grounds.
• Locate the emergency power-off switch in the room before installation. Shut off the power
immediately if an accident occurs.
• Unplug all the external cables (including power cables) before moving the chassis.
• Do not work alone when you operate the switch with the switch powered on.
• Always check that the power has been disconnected when you perform operations that require the
switch to be powered off.
Laser safety
ht emitted from the optical fiber
might hurt your eyes.
• Before you disconnect the fiber connector, execute the shutdown command in interface view to
disable the optical source.
• Install the dust covers to the optical fiber connector to avoid connector damage.
Examining the installation site
The switch can only be used indoors. To ensure normal operation and a long lifespan for your switch, the
installation site must meet the requirements in this section.
Temperature and humidity….
Maintain appropriate temperature and humidity in the equipment room.
• Continuous high relative humidity can cause poor insulation, electricity creepage, and metal
corrosion and can change the mechanical property of materials.
• Continuous low relative humidity can cause washer contraction and ESD and introduce problems
such as loose captive screws and circuit failure.
• High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
To ensure correct operation of the switch, the equipment room must meet the temperature and humidity
requirements listed in Table 1.
Table 1 Temperature/
humidity requirements in the equipment room
Temperature Relative humidity
0°C to 45°C (32°F to 113°F) 5% to 95%, noncondensing
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