Cisco 7906G Administration Guide - Page 59

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network Providing Power to the Cisco Unified IP Phones 7906G and 7911G Table 2-1 Guidelines for Powering the Cisco Unified IP Phones 7906G and 7911G Power Type Guidelines External power- The Cisco Unified IP Phone Series use the CP-PWR-CUBE-3 power Provided through a Cisco supply. external 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 phone. PoE power-Provided by a switch through the Ethernet cable attached to the phone. • The Cisco Unified IP Phones 7906G and 7911G support both Cisco inline power and IEEE 802.3af Power over Ethernet. • 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. Power Outage Your accessibility to emergency service through the phone is dependent on the phone being powered. If there is an interruption in the power supply, Service and Emergency Calling Service dialing will not function until power is restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before using the Service or Emergency Calling Service dialing. Obtaining Additional Information about Power For related information about power, refer to the documents shown in Table 2-2. These documents provide information about these topics: • Cisco switches that work with the Cisco Unified IP Phones 7906G and 7911G OL-14585-01 Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.1 2-5