Understanding Phone Configuration Files - Cisco 7960G Administration Manual

Chapter 2 Preparing to Install the Cisco IP Phone on Your Network

Understanding Phone Configuration Files

Note
Note
Cisco IP Phone Administration Guide for Cisco CallManager 4.0, Cisco IP Phones 7960G/7940G
OL-4825-01
Configuration files for a phone are stored on the TFTP server and define
parameters for connecting to Cisco CallManager. In general, any time you make
a change in Cisco 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 new image file.
In addition, if the device security mode in the configuration file is set to
Authenticated, the phone contains a valid LSC, and the CTL file on the phone has
a valid certificate for Cisco CallManager, the phone establishes a TLS connection
to Cisco CallManager. Otherwise, the phone establishes a TCP connection.
A phone requests a configuration file whenever it resets and registers with
Cisco CallManager.
If a phone receives a CTL file with a valid certificate for the TFTP server, the
phone requests a signed .cnf.xml.sgn configuration file instead the .cnf.xml file.
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 CallManager
•
The phone has not been added to the Cisco CallManager Database
•
The phone is registering for the first time
•
If security is implemented, a phone will not access the XmlDefault.cnf.xml
configuration file.
All other times, a phone accesses a .cnf.xml file corresponding to its device name.

Understanding Phone Configuration Files

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