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Chapter 2 Preparing for Installation
Safety Warnings
2-2
Cisco Global Site Selector 4490 Hardware Installation Guide
78-15755-02
Safety Warnings
Before you install the Cisco Global Site Selector 4490, observe the following
safety warnings.
Warning
Only trained and qualified personnel should be allowed to install, replace, or
service this equipment.
Warning
Read the installation instructions before connecting the system to the
power source.
Warning
Before working on a system that has an on/off switch, turn OFF the power and
unplug the power cord.
Warning
The device is designed to work with TN power systems.
Warning
This unit is intended for installation in restricted access areas. A restricted
access area is where access can only be gained by service personnel through
the use of a special tool, lock and key, or other means of security, and is
controlled by the authority responsible for the location.
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits
to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits,
and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45
connectors. Use caution when connecting cables.
Warning
This product relies on the building’s installation for short-circuit (overcurrent)
protection. Ensure that the protective device is rated not greater than: 15A
minimum, 60VDC.