Preventing Electrostatic Discharge Damage; General Site Requirements; Rack Requirements - Cisco WS-C2950-24 Installation Manual

General Site Requirements

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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Preventing 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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For the safety of your equipment, periodically check the resistance value of the antistatic strap. It should
Caution
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.

Rack Requirements

Some Cisco routers include brackets for use with a 19-inch rack or, if specified in your order, optional
larger brackets for use with a 23-inch rack.
The following information can help you plan your equipment rack configuration:
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Cisco 2900 Series and 3900 Series Hardware Installation Guide
2-4
If possible, send another person to get medical aid. Otherwise, assess the condition of the victim
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and then call for help.
– Determine if the person needs rescue breathing or external cardiac compressions; then take
appropriate action.
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.
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.
Allow clearance around the rack for maintenance.
Allow at least one rack unit of vertical space between routers.
Chapter 2 Preparing for Router Installation
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