Opening The Chassis - Cisco 1721 - VPN Security Router Bundle Hardware Installation Manual

Hardware installation guide

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Opening the Chassis

Warning

Opening the Chassis

Step 1

Step 2

Step 3

Cisco 1721 Router Hardware Installation Guide

C-2

Appendix C

Before working on a system that has an on/off switch, turn OFF the power

and unplug the power cord.

Do not work on the system or connect or disconnect cables during periods

of lightning activity.

Read the installation instructions before you connect the system to its power

source.

Before working on equipment that is connected to power lines, remove

jewelry (including rings, necklaces, and watches). Metal objects will heat

up when connected to power and ground and can cause serious burns or

weld the metal object to the terminals.

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.

In order to upgrade Cisco 1721 router memory, you must open the chassis.

Opening the chassis requires a number one Phillips screwdriver.

Follow these steps to open the chassis:

Make sure the router is turned off and is disconnected from the power supply.

Turn the router upside down, and rest the top of the router on a flat surface.

Use the Phillips screwdriver to remove the four screws that hold the top and

bottom of the chassis together, as shown in

Installing and Upgrading Memory and Virtual Private Network Modules

Figure

C-1.

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