Understanding Phone Configuration Files - Cisco 7970G - IP Phone VoIP Administration Manual

Understanding Phone Configuration Files

Understanding Phone Configuration Files
Note
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
2-8
Chapter 2
Table 2-3 Related Documentation for Power (continued)
Document Topics
Cisco Catalyst Switches
Integrated Service Routers
Cisco IOS Software
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 that is 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 file 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
protocol in the phone configuration file be set to TLS, which corresponds to the
transport type in the SIP Security Profile in Cisco Unified Communications
Manager.
If the device security mode in the configuration file is set to Authenticated or
Encrypted, but the phone has not received a CTL file, the phone continuously tries
to obtain a CTL file so it can register securely.
Preparing to Install the Cisco Unified IP Phone on Your Network
URL
http://www.cisco.com/en/US/products
/hw/switches/tsd_products_support_ca
tegory_home.html
http://www.cisco.com/en/US/products
/hw/routers/index.html
http://www.cisco.com/en/US/products
/sw/iosswrel/products_ios_cisco_ios_
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