Preparing to Install Network Modules 2-3
Preventing Electrostatic Discharge Damage
Follow these guidelines when working on equipment powered by electricity:
• Locate the emergency power-off switch in the room in which you are working. Then, if
an electrical accident occurs, you can quickly shut the power OFF.
• Before working on the router, turn OFF the power and unplug the power cord.
• Disconnect all power before doing the following:
— Installing or removing a router chassis
— Working near power supplies
• Do not work alone if potentially hazardous conditions exist.
• Never assume that power is disconnected from a circuit. Always check.
• Look carefully for possible hazards in your work area, such as moist floors, ungrounded
power extension cables, and missing safety grounds.
• If an electrical accident occurs, proceed as follows:
— Use caution; do not become a victim yourself.
— Turn OFF power to the router.
— If possible, send another person to get medical aid. Otherwise, determine the
condition of the victim and then call for help.
— Determine if the person needs rescue breathing or external cardiac compressions;
then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It
occurs when electronic printed circuit cards are improperly handled and can result in
complete or intermittent failures. Always follow ESD prevention procedures when
removing and replacing cards. Ensure that the router chassis is electrically connected to
earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact.
Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted
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