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Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
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
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.
Ta b l e 2-2 Related Documentation for Power
Document Topics URL
Cisco Unified IP Phone Power
Injector
http://www.cisco.com/en/US/products/ps6951/index.html
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