2
• 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 cords) before moving the chassis.
• Do not work alone when you operate the device with the device powered on.
• Always verify that the power has been disconnected when you perform operations that require
the device to be powered off.
Laser safety
WARNING!
Do not stare into any open apertures of operating transceiver modules or optical fiber connectors.
The laser light emitted from these apertures might hurt your eyes.
CAUTION:
• Before you remove the optical fiber connector from a fiber port, execute the shutdown command
in interface view to shut down the port.
• Insert a dust cap into any open optical fiber connector and a dust plug into any open fiber port o
transceiver module port to protect them from contamination and ESD damage.
Examining the installation site
The device can only be used indoors. To ensure correct operation and a long lifespan for your device,
the installation site must meet the requirements in this section.
Temperature and humidity
Maintain the temperature and humidity in the equipment room at acceptable levels.
• Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
• Lasting low relative humidity can cause washer contraction and ESD and bring problems
including 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 device, the equipment room must meet the temperature and
humidity requirements listed in Table 1.
Table 1
Temperature/humidity requirements in the equipment room
Temperature Humidity
0°C to 45°C (32°F to 113°F) 5% RH to 95% RH, noncondensing
Cleanliness
Dust buildup on the chassis can result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure. To ensure correct operation, the
equipment room must meet the dust concentration requirements listed in Table 2.
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