Cisco 3631 Guía de instalación descargar pdf (Pagina 13)

Upgrading System Memory in Cisco 3600 Series Routers

78-3636-05

Safety Recommendations

Warning

Hazardous network voltages are present in WAN ports regardless of whether power to the router is

OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching

cables, detach the end away from the router first. To see translations of the warnings that appear in

this publication, refer to the

Regulatory Compliance and Safety Information

document that

accompanied this device.

Warning

The Ethernet 10BaseT, serial, console, and auxiliary ports contain safety extra-low voltage (SELV)

circuits. BRI circuits are treated like telephone-network voltage (TNV) circuits. Avoid connecting

SELV circuits to TNV circuits. To seetranslations of thewarnings that appear in this publication, refer

to the

Regulatory Compliance and Safety Information

document that accompanied this device.

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

–

Performing most hardware upgrades

• 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 victim 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. ESD can occur

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 ESD voltages to ground. To properly guard against ESD damage and shocks, you must

use the wrist strap and cord properly. If no wrist strap is available, ground yourself by touching the metal

part of the chassis.

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Cisco 3631 Guía de instalación Pagina 13

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