AppendixD Installing the Virtual Private Network Module
Before You Begin

D-2

Cisco 1760 Modular Access Router Hardware Installation Guide
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Safety Warnings
Warning
Before working on a system that has an on/off switch, turn OFF the power and
unplug the power cord.
Warning
Before opening the chassis, disconnect the telephone-network cables to avoid
contact with telephone-network voltages.
Warning
Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Warning
Do not touch the power supply when the power cord is connected. For systems
with a power switch, line voltages are present within the power supply even
when the power switch is off and the power cord is connected. For systems
without a power switch, line voltages are present within the power supply
when the power cord is connected.
Warning
Read the installation instructions before you connect the system to its power
source.
Warning
Ultimate disposal of this product should be handled according to all national
laws and regulations.
Warning
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.