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Cisco ip phone 7931g Manual

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Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.1
OL-14587-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding Phone Configuration Files
Configuration files also contain information about which image load the phone
should be running. If this image load differs from the one currently that is loaded
on a phone currently, 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.
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.
If you configure security-related settings in Cisco Unified Communications
Manager Administration, the phone configuration file will contain sensitive
information. To ensure the privacy of a configuration file, you must configure it
for encryption. For detailed information, refer to the “Configuring Encrypted
Phone Configuration Files” chapter in Cisco Unified Communications Manager
Security Guide.
A phone accesses a default configuration file named XmlDefault.cnf.xml from the
TFTP server when these 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. In this case, the phone resets and attempts to register repeatedly.
If the phone has registered before, the phone accesses the configuration file
named SEPmac_address.cnf.xml, where mac_address is the MAC address of the
phone.
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