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Cisco MWR 1941-DC-A Mobile Wireless Edge Router Hardware Installation Guide
OL-7872-04
Chapter 2 Preparing to Install the Router
Safety Guidelines
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up when connected to power and ground and can
cause serious burns or weld the metal object to the terminals.
Statement 43
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units.
Statement 12
Warning
Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Follow these guidelines when working on equipment powered by electricity:
•
Locate the room’s emergency power-off switch. Then, if an electrical accident occurs, you can
quickly turn off the power.
•
Before working on the system, turn off the DC main circuit breaker and disconnect the power
terminal block cable.
•
Disconnect all power before doing the following:
–
Working on or near power supplies
–
Installing or removing a router chassis or network processor module
–
Performing most hardware upgrades
•
Never install equipment that appears damaged.
•
Carefully examine your work area for possible hazards, such as moist floors, ungrounded power
extension cables, and missing safety grounds.
•
Never assume that power is disconnected from a circuit;
always
check.
•
Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
•
If an electrical accident occurs, proceed as follows:
–
Use caution, and do not become a victim yourself.
–
Turn off power to the router.
–
If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim, and then call for help.
–
Determine whether the person needs rescue breathing or external cardiac compressions; then
take appropriate action.
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 network cabling:
•
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 un-insulated telephone wires or terminals unless the telephone line is disconnected at
the network interface.
•
Use caution when installing or modifying telephone lines.
