Cisco Systems OL-4314-01 manual Setting Up the Cisco IP Phone Before You Begin

Chapter 3 Setting Up the Cisco IP Phone

Before You Begin

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.

Caution Only use the proper Cisco approved external power supply. Reference the installation manual provided with the phone.

The following warnings apply 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.

Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device.

	Cisco IP Phone 7970 Administration Guide for Cisco CallManager 3.3
OL-4314-01		3-7