Cisco 7970 Setting Up page 7

Chapter 3 Setting Up the Cisco IP Phone
Only trained and qualified personnel should be allowed to install, replace, or
Warning
service this equipment.
Ultimate disposal of this product should be handled according to all national
Warning
laws and regulations.
Warning Do not work on the system or connect or disconnect cables during periods of
lightning activity.
To avoid electric shock, do not connect safety extra low voltage (SELV) circuits
Warning
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.
Only use the proper Cisco approved external power supply. Reference the
Caution
installation manual provided with the phone.
The following warnings apply when you use an external power supply.
This product relies on the building's installation for short-circuit (overcurrent)
Warning
protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15 A
U.S. (240 VAC, 10 A international) is used on the phase conductors (all
current-carrying conductors).
The device is designed to work with TN power systems.
Warning
Warning The plug-socket combination must be accessible at all times because it serves
as the main disconnecting device.
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Cisco IP Phone 7970 Administration Guide for Cisco CallManager 3.3
Before You Begin
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