Electrostatic Discharge Prevention - Cisco NPE-175 Installation And Configuration Manual

Chapter 8 Preparation for Installation
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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 processing engine or network services engine, I/O controller, port adapters, and
Cisco uBR7200 series cable interface line cards consist 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 processing engine or network services engine, I/O controller, port
adapters, and Cisco uBR7200 series cable interface line cards by their carrier edges and handles; never
touch the printed circuit board or connector pins.
Figure 8-2
services engine, I/O controller, or Cisco uBR7200 series cable interface line card metal carrier. Do not
touch the printed circuit board when handling any of the components.
Figure 8-2
1
Figure 8-3
printed circuit board when handling a port adapter.
OL-4448-12
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 processing engine or network
Handling the Network Processing Engine or Network Services Engine, the I/O
Controller, and the Cisco uBR7200 Series Cable Interface Line Cards—Side View
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2
Printed circuit board
shows the location of a printed circuit board in a port adapter metal carrier. Do not touch the
Network Processing Engine and Network Services Engine Installation and Configuration
Software and Hardware Requirements
2
Metal carrier
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