Preventing Electrostatic Discharge Damage; General Site Requirements; Site Environment - Cisco EF4116 Hardware Installation And Maintenance Manual

In addition, use the guidelines that follow when working with any equipment that is disconnected
from a power source, but still connected to telephone wiring or other network cabling.
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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 chassis frame surface to
safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and
shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground
yourself by touching the metal part of the chassis.
Caution
strap, which should be within the range of 750 kilohm and 10 megohm.

General Site Requirements

This section describes the requirements your site must meet for safe installation and operation of
your system. Ensure that your site is properly prepared before beginning installation.
The router can be used as desktop or rack-mounted equipment in a data processing or lab
environment. In addition, the system can be mounted in either a standard or telco rack. Optional
rack-mount kits are available.
For desktop mounting, use the rubber feet provided. They protect the chassis and provide a nonskid
surface.

Site Environment

The location of individual chassis and the layout of your equipment rack or wiring room are
extremely important for proper system operation. Equipment placed too close together, inadequate
ventilation, and inaccessible panels can cause system malfunctions and shutdowns, and can make
system maintenance difficult.
When planning your site layout and equipment locations, use the following precautions to help avoid
equipment failures and reduce the possibility of environmentally caused shutdowns. If you are
currently experiencing shutdowns or unusually high errors with your existing equipment, these
precautions will help you isolate the cause of failures and prevent future problems.
Never install telephone wiring during a lightning storm.
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
Never touch uninsulated telephone wires or terminals unless the telephone line is disconnected
at the network interface.
Use caution when installing or modifying telephone lines.
For the safety of your equipment, periodically check the resistance value of the antistatic
General Site Requirements
Preparing for Installation 2-3