Cisco 7961G Administration Guide - Page 68

Understanding Phone Configuration Files Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network Obtaining Additional Information about Power For related information about power, refer to the documents shown in Table 2-3. These documents provide information about the following topics: • Cisco switches that work with the Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE • The Cisco IOS releases that support bidirectional power negotiation • Other requirements and restrictions regarding power Table 2-3 Related Documentation for Power Document Topics URL Cisco Unified IP Phone http://www.cisco.com/en/US/products/hw/phones/p Power Injector s379/prod_installation_guides_list.html PoE Solutions http://www.cisco.com/en/US/netsol/ ns340/ns394/ns147/ns412/networking_solutions_ package.html Cisco Catalyst Switches http://www.cisco.com/univercd/cc/td/ doc/product/lan/index.htm Integrated Service Routers http://www.cisco.com/en/US/products/hw/routers/ index.html Cisco IOS Software http://www.cisco.com/en/US/products/sw/iosswrel/ products_ios_cisco_ios_software_category_home. html Understanding Phone Configuration Files Configuration files for a phone are stored on the TFTP server and define parameters for connecting to Cisco Unified CallManager. In general, any time you make a change in Cisco Unified CallManager that requires the phone to be reset, a change is made to the phone's configuration file automatically. Configuration files also contain information about which image load the phone should be running. If this image load differs from the one currently loaded on a phone, the phone contacts the TFTP server to request the required load files. (These files are digitally signed to ensure the authenticity of the files' source.) Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE Administration Guide for Cisco Unified CallManager 2-8 OL-11528-01