Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding Phone Configuration Files
•Other requirements and restrictions regarding power
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Document Topics | URL |
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Cisco Unified IP Phone | http://www.cisco.com/en/US/products/hw/phones/p |
Power Injector | s379/prod_installation_guides_list.html |
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PoE Solutions | http://www.cisco.com/en/US/netsol/ |
| ns340/ns394/ns147/ns412/networking_solutions_ |
| package.html |
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Cisco Catalyst Switches | http://www.cisco.com/en/US/products/hw/switches/ |
| tsd_products_support_category_home.html |
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Integrated Service | http://www.cisco.com/en/US/products/hw/routers/ |
Routers | index.html |
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Cisco IOS Software | http://www.cisco.com/en/US/products/sw/iosswrel/ |
| products_ios_cisco_ios_software_category_home. |
| html |
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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 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.)
In addition, if the device security mode in the configuration file is set to Authenticated and the CTL file on the phone has a valid certificate for
Cisco Unified Communications Manager, the phone establishes a TLS connection to Cisco Unified Communications Manager. Otherwise, the phone establishes a TCP connection. For SIP phones, a TLS connection requires that the transport
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