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Network Processing Engine and Network Services Engine Installation and Configuration
OL-4448-12
Chapter 8 Preparation for Installation
Software and Hardware Requirements
• 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.
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 shows the location of a printed circuit board in a network processing engine or network
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 Handling the Network Processing Engine or Network Services Engine, the I/O
Controller, and the Cisco uBR7200 Series Cable Interface Line Cards—Side View
Figure 8-3 shows the location of a printed circuit board in a port adapter metal carrier. Do not touch the
printed circuit board when handling a port adapter.
1 Printed circuit board 2 Metal carrier
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