Electrical Equipment Guidelines; Telephone Wiring Guidelines; Electrostatic Discharge Prevention - Cisco 7304 Installation And Configuration Manual

Safety Guidelines
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använda batterier.

Electrical Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:
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Telephone Wiring Guidelines

Use the following guidelines when working with any equipment that is connected to telephone wiring or
to other network cabling:
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Electrostatic Discharge Prevention

Electrostatic discharge (ESD) damages equipment and impairs electrical circuitry. ESD occurs when
printed circuit boards are improperly handled and results in complete or intermittent failures.
The network services engine consists of printed circuit boards that are fixed in a metal carrier.
Electromagnetic interference (EMI) shielding, connectors, and a handle are integral components of the
carrier. Handle the network services engine by its carrier edges and handles; never touch the printed
circuit board or connector pins.
Figure 3-1
printed circuit board when handling any of the components.
Cisco 7304 Network Service Engine Installation and Configuration
3-12
Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
Disconnect all power and external cables before moving a chassis.
Do not work alone when potentially hazardous conditions exist.
Never assume that power has been disconnected from a circuit; always check.
Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
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 has been
disconnected at the network interface.
Use caution when installing or modifying telephone lines.
shows the location of a printed circuit board in a network services engine. Do not touch the
Chapter 3 Preparation for Installation
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