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Cisco ASR 920 Series Aggregation Services Router Hardware Installation Guide
OL-32751-01
Chapter 2 Preparing for Installation
Safety Guidelines
•
Before starting work on the system, turn off the DC main circuit breaker and disconnect the power
terminal block cable.
•
Before doing the following, disconnect all power:
–
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 uninsulated telephone wires or terminals unless the telephone line is disconnected at
the network interface.
•
When installing or modifying telephone lines, use caution.
