Troubleshooting guide

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When carrying or packing a Switch and its optional modules, wear a wrist
strap to protect against static electricity.
• Be sure to wear an antistatic wrist strap. If you handle the Switch without wearing an
antistatic wrist strap, the Switch might be damaged by static electricity.
When removing optional modules, attach blank panels.
• When removing optional modules, attach blank panels. If you use the Switch without
attaching a blank panel, airflow through the Switch cannot be maintained. If airflow is not
maintained, the temperature inside the Switch rises, resulting in a failure.
When installing a network interface unit, keep the tray attached.
• When installing a network interface (NIF) unit, keep the tray attached to the Switch. If a
NIF is inserted without the tray attached, the NIF will not fit with the connector of the
Switch, possibly resulting in damage to both the Switch and the connector of the NIF.
Be careful when installing an optional module.
• When installing an optional module, follow the procedures below. Not doing so could
result in a failure.
1. Open the levers as shown in the figure.
2. Hold the levers, and push the optional module slowly until the levers touch the Switch.
3. Insert the optional module all the way by using the levers. When moving the levers, move
them slowly (by taking at least one second) without using excessive force.
Before removing an optional module, loosen the screws completely.
• The levers are used when removing a management and switching unit or network interface
unit. If the screws are not loosened completely, the optional module might be damaged
when the levers are opened.
When carrying and packing optional modules, handle them carefully.
• Do not touch the installed components and the solder surface when carrying or packing an
optional module, such as a management and switching unit, network interface unit,
memory card, transceiver, or power supply unit. Also, when storing an optional module,
use an antistatic bag.
Do not place a Switch in a high-temperature location.
• Do not place a Switch in direct sunlight or near a heater or other heat-generating apparatus.
Do not use a TV or a radio near a Switch.
• Do not use a TV or a radio near a Switch. Placing a Switch near a TV or a radio could affect