• Make sure that you have a readily accessible two-poled disconnect device incorporated in the fixed
configuration wiring of a CRS configured with the DC-input power system.
• Make sure that you provide short-circuit (overcurrent) protection as part of the building installation.
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 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 connection socket on the router or to a bare metal
surface on the chassis.
• 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 the card and clothing. The wrist strap protects the board from only ESD voltage
on the body; ESD voltage on clothing can still cause damage.
Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
14
Overview
Preventing Electrostatic Discharge
