Understanding The Phone Startup Process - Cisco 7961G - IP Phone VoIP Administration Manual

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

Understanding the Phone Startup Process

Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE Administration Guide for Cisco Unified CallManager
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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 CallManager, the phone establishes a TLS connection to
Cisco Unified CallManager. Otherwise, the phone establishes a TCP connection.
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 CallManager
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 CallManager Security Guide.A
phone requests a configuration file whenever it resets and registers with
Cisco Unified 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 Unified CallManager
•
The phone has not been added to the Cisco Unified 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 Unified 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.
When connecting to the VoIP network, the Cisco Unified
IP Phone 7961G/7961G-GE and 7941G/7941G-GE go through a standard startup
process that is described in
configuration, not all of these steps may occur on your Cisco Unified IP Phone.
Understanding the Phone Startup Process
Table 2-4. Depending on your specific network
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