Cisco 6921 Administration Guide - Page 39

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network Understanding Phone Configuration Files Obtaining Additional Information about Power For related information about power, refer to the documents shown in Table 2-2. These documents provide information about the following topics: • Cisco switches that work with the Cisco Unified IP Phone 6921, 6941, and 6961 • The Cisco IOS releases that support bidirectional power negotiation • Other requirements and restrictions regarding power Table 2-2 Related Documentation for Power Document Topics URL Cisco Unified IP Phone Power http://www.cisco.com/en/US/products/ps6951/index.html Injector PoE Solutions http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/net working_solutions_package.html Cisco Catalyst Switches http://cisco.com/en/US/products/hw/switches/index.html 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 Communications Manager. In general, any time you make a change in Cisco Unified Communications Manager that requires the phone to be reset, a change is automatically made to the phone's configuration file. 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. A phone accesses a default configuration file named XmlDefault.cnf.xml from the TFTP server when the following conditions exist: • You have enabled auto-registration in Cisco Unified Communications Manager • The phone has not been added to the Cisco Unified Communications Manager database • The phone is registering for the first time If auto registration is not enabled and the phone has not been added to the Cisco Unified Communications Manager database, the phone registration request will be rejected and display a blank screen. If the phone has registered before, the phone will access the configuration file named SEPmac_address.cnf.xml, where mac_address is the MAC address of the phone. The filenames are derived from the MAC address and description fields in the Phone Configuration window of Cisco Unified Communications Manager Administration. The MAC address uniquely identifies the phone. For more information on phone configuration settings, go to the Cisco Unified IP Phone Configuration chapter in the Cisco Unified Communications Manager Administration Guide. Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP) OL-19025-01 2-5