Installation Manual

CiscouBR7200 Series Universal Broadband Router Wireless Modem Card and Subsystem Installation and Configuration 11
Safety Guidelines
ALPHA DRAFT - CISCO CONFIDENTIAL
Telephone Wiring Guidelines
Use the following guidelines when working with any equipment that is connected to telephone
wiring or to other network cabling:
• 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.
Preventing Electrostatic Discharge Damage
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, I/O controller, port adapters, and wireless modem cards consist of
a printed circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding,
connectors, and a handle are integral components of the carrier. Handle the network processing
engine, I/O controller, port adapters, and wireless modem cards by their carrier edges and handles;
never touch the printed circuit board when handling either component.
Figure8 shows the location of a printed circuit board when it is installed in a network processing
engine, I/O controller, or CiscouBR7200 series modem card metal carrier. Do not touch the printed
circuit board when handling either component.
Figure8 Handling the Cisco uBR7200 Series Wireless Modem Cards—Side View
Although the metal carrier helps to protect the printed circuit boards from ESD, wear a preventive
antistatic strap whenever handling the network processing engine, I/O controller, port adapters, or
wireless modem cards. Ensure that the strap makes good skin contact and connect the strap’s clip to
an unpainted chassis surface to safely channel unwanted ESD voltages to ground.
If no wrist strap is available, ground yourself by touching the metal part of the chassis.
CautionMake sure to tighten the captive installation screws on the network processing engine, the
I/O controller, and the wireless modem cards (use a number2 Phillips screwdriver). These screws
prevent accidental removal, provide proper grounding for the router, and help to ensure that the
network processing engine, I/O controller, and modem cards are properly seated in the router
midplane.