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Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
Chapter 3 Installing the Cisco IP Phone
Before You Begin
Safety
Review the following warnings before installing the Cisco IP Phone.
Warning
Read the installation instructions before you connect the system to its power
source.
Warning
Only trained and qualified personnel should be allowed to install, replace, or
service this equipment.
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 both use RJ-45
connectors. Use caution when connecting cables.
The following warning applies when you use an external power supply.
Warning
This product relies on the building's installation for short-circuit (overcurrent)
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).
Warning
The device is designed to work with TN power systems.