Preventing Electrostatic Discharge Damage; Safety Warnings - Cisco ASR 901S Series Preparing To Install

Preparing to Install the Router
• Never assume that power is disconnected from a circuit; always check.
• Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
• If an electrical accident occurs, proceed as follows:
In addition, use the following guidelines when working with any equipment that is disconnected from a power
source, but still connected to telephone wiring or network cabling:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for it.
• Never touch un-insulated telephone wires or terminals unless the telephone line is disconnected at the
• When installing or modifying telephone lines, use caution.

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 cause complete or intermittent failures. When
removing and replacing modules, always follow ESD prevention procedures:
• Ensure that the router chassis is electrically connected to earth ground.
• Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. To channel unwanted
• If no wrist strap is available, ground yourself by touching a metal part of the chassis.
For the safety of your equipment, periodically check the resistance value of the antistatic wrist strap. It
Caution
should be between 1 and 10 Mohm.

Safety Warnings

This section contains important safety warnings for the installation and use of the router.
Translated versions of all safety warnings are available in the safety warnings document that is available on
Cisco.com.
OL-29732-02
◦ Use caution, and do not become a victim yourself.
◦ Switch 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 whether the person needs rescue breathing or external cardiac compressions; then take
appropriate action.
network interface.
ESD voltages safely to ground, connect the clip to an unpainted surface of the chassis frame. To guard
against ESD damage and shocks, the wrist strap and cord must operate effectively.
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
Preventing Electrostatic Discharge Damage
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