Chapter 2 Installing the Cisco IP Phone 7910 Series
Safety Notices
2-2
Getting Started with the Cisco IP Phone 7910 Series
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Warning
Read the installation instructions before you connect the system to its power
source.
Warning
Ultimate disposal of this product should be handled according to all national
laws and regulations.
Warning
Do not work on the system or connect or disconnect cables during periods of
lightning activity.
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 use RJ-45
connectors. Use caution when connecting cables.
The next warning applies when you use an external power supply.
Warning
This product relies on the building's installation for short-circuit (over current)
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S.
(240 VAC, 10A international) is used on the phase conductors (all
current-carrying conductors).
Warning
The device is designed to work with TN power systems.