Cisco 7970G Administration Guide - Page 57

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network Providing Power to the Phone The following sections provide more information about powering a phone: • Power Guidelines, page 2-5 • Phone Power Consumption and Display Brightness, page 2-6 • Power Outage, page 2-7 • Obtaining Additional Information about Power, page 2-7 Power Guidelines Table 2-1 Table 2-1 provides guidelines that apply to external power and to PoE power for phones the Cisco Unified IP Phone 7970 Series. Guidelines for Powering the Cisco Unified IP Phone 7970 Series Power Type Guidelines External power- Provided through the CP-PWR-CUBE-3 external power supply The Cisco Unified IP Phone Series uses the CP-PWR-CUBE-3 power supply. External power- Provided through the Cisco Unified IP Phone Power Injector The Cisco Unified IP Phone Power Injector may be used with any Cisco Unified IP Phone. Functioning as a midspan device, the injector delivers inline power to the attached phone. The Cisco Unified IP Phone Power Injector is connected between a switch port and the IP Phone, and supports a maximum cable length of 100m between the unpowered switch and the IP Phone. PoE power-Provided by a switch through the Ethernet cable attached to the phone • The inline power patch panel WS-PWR-PANEL is not compatible with the Cisco Unified IP Phone 7970 Series. • To ensure uninterruptible operation of the phone, make sure that the switch has a backup power supply. • Make sure that the CatOS or IOS version running on your switch supports your intended phone deployment. Refer to the documentation for your switch for operating system version information. Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1 OL-14626-01 2-5