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Cisco Network Convergence System 4000 Series Hardware Installation Guide
Chapter 2 Chassis Overview
Safety Guidelines
Preventing Electrostatic Discharge
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. We recommend use of an
ESD-preventive wrist strap whenever you handle network equipment or one of its components.
Following are guidelines for preventing ESD damage:
•
Always use an ESD-preventive wrist or ankle strap, and ensure that it makes good skin contact.
Connect the equipment end of the connection cord to an ESD jack (
and
) or a
bare metal surface on the chassis (ensure the chassis is grounded).
•
Handle a card by its ejector levers, when applicable, or its metal carrier only; avoid touching the
board or connector pins.
•
Place a removed card board side up on an antistatic surface or in a static-shielding bag. If you plan
to return the component to the factory, immediately place it in a static-shielding bag.
•
Avoid contact between a card and clothing. The wrist strap protects the board from only ESD voltage
on the body; ESD voltage on clothing can still cause damage.
shows the ESD jacks on the top of the chassis.
Figure 2-8
ESD Jacks—Top of Chassis
1
Top ETSI connection point
2
Top ANSI jacket point
