Cisco 7961G Administration Guide

Chapter 2 Preparing to Install the Cisco IP Phone on Your Network
Understanding Phone Configuration Files
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Cisco IP Phone Administration Guide for Cisco CallManager, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
Understanding Phone Configuration Files
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 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 CallManager, the phone establishes a TLS connection to
Cisco CallManager. Otherwise, the phone establishes a TCP connection.
Note 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 will continuously
try to obtain a CTL file so that it can register securely.
A phone requests a configuration file whenever it resets and registers with
Cisco CallManager.
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 auto registration is not enabled and the phone has not been added to the
Cisco CallManager Database, the phone registration request will be rejected. In
this case, the phone will reset and attempt to register repeatedly.
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.

Cisco 7961G Specifications

General

Brand	Cisco
Model	7961G
Category	IP Phone
Language	English