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Chapter 2
Cisco 4000 Series ISRs Preinstallation
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 other network cabling:
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Prevent Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It can occur if
electronic printed circuit cards are improperly handled and can cause complete or intermittent failures.
Always follow ESD prevention procedures when removing and replacing modules:
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Caution
For the safety of your equipment, periodically check the resistance value of the anti-static strap. It should
be between 1 and 10 megohms (Mohm).
General Site Requirements
This section describes the requirements your site must meet for safe installation and operation of your
router. Ensure that the site is properly prepared before beginning installation. If you are experiencing
shutdowns or unusually high errors with your existing equipment, this section can also help you isolate
the cause of failures and prevent future problems.
General Precautions
Observe the following general precautions when using and working with your Cisco 4000 Series ISRs.
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OL-32185-02
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 uninsulated telephone wires or terminals unless the telephone line is disconnected at
the network interface.
Use caution when installing or modifying telephone lines.
Remove power cables from all installed power supplies before opening the chassis.
Ensure that the router chassis is electrically connected to 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 channel unwanted ESD voltages safely to ground. To
guard against ESD damage and shocks, the wrist strap and cord must operate effectively.
If no wrist strap is available, ground yourself by touching a metal part of the chassis.
Keep your system components away from radiators and heat sources and do not block cooling vents.
Do not spill food or liquids on your system components and never operate the product in a wet
environment.
Do not push any objects into the openings of your system components. Doing so can cause fire or
electric shock by shorting out interior components.
Position system cables and power supply cables carefully. Route system cables and the power supply
cable and plug so that they cannot be stepped on or tripped over. Be sure that nothing else rests on
your system component cables or power cable.
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
General Site Requirements
2-7
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