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In addition, use the guidelines that follow when working with any equipment that is
disconnected from a power source, but still connected to telephone or network wiring:
•
Never install telephone wiring during a lightning storm.
•
Never install telephone jacks in wet locations unless the jack is specifically designed for
wet locations.
•
Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
•
Use caution when installing or modifying telephone lines.
Preventing Electrostatic Discharge Damage
Many router components are sensitive to damage from static electricity. Some components
can be degraded by voltages as low as 30V. Conversely, static voltages as high as
35,000V can be generated just by handling plastic or foam packing material, or by sliding
assemblies across plastic and carpets. Not exercising the proper electrostatic discharge
(ESD) precautions can result in intermittent or complete component failures. To minimize
the potential for ESD damage, observe the following guidelines:
•
Always use an ESD wrist strap or ankle strap and ensure that it makes good skin contact.
•
When handling a removed line card, switch fabric card, or RP, make sure the equipment
end of your ESD strap is attached to one of the two upper card cage ESD connection
sockets or to bare metal on the frame. Avoid contact between the card and your clothing.
The wrist strap only protects the card from ESD voltages on the body; EDS voltages on
the clothing can still cause component damage.
•
Always place a card component-side up on an antistatic surface, in an antistatic card
rack, or in a static shielding bag. If you are returning the item to the factory, immediately
place it in a static shielding bag.
•
When installing a line card or RP, use the ejector levers to properly seat the card
connectors in the backplane, then tighten both captive screws. These screws prevent
accidental removal, provide proper grounding for the system, and help to ensure that the
card connector is seated in the backplane.
Safety Recommendations
Preparing for Installation 2-5
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Troubleshooting
