Obtaining Additional Information About Power; Understanding Phone Configuration Files - Cisco 6901 Administration Manual

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

Obtaining Additional Information About Power

For related information about power, refer to the documents shown in
provide information about the following topics:
•
•
•
Table 2-2
Document Topics
Cisco Unified IP Phone Power
Injector
PoE Solutions
Cisco Catalyst Switches
Integrated Service Routers
Cisco IOS Software

Understanding Phone Configuration Files

The TFTP server stores the phone configuration files that 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 currently loaded on a phone, the phone contacts the TFTP server to
request the required load files.
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.
If the device security mode in the configuration file is set to Authenticated or Encrypted, but the phone
Note
has not received a CTL file, the phone tries four times to obtain a CTL file so it can register securely.
If you configure security-related settings in Cisco Unified Communications Manager, the phone
configuration file contains sensitive information. To ensure the privacy of a configuration file, you must
configure it for encryption. For detailed information, refer to the
Configuration
requests a configuration file whenever it resets and registers with Cisco Unified Communications
Manager.
A phone accesses a default configuration file named XmlDefault.cnf.xml from the TFTP server when
the following conditions exist:
Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24582-01
Cisco switches that work with the Cisco Unified IP Phone 6901 and 6911
The Cisco IOS releases that support bidirectional power negotiation
Other requirements and restrictions regarding power
Related Documentation for Power
Files" chapter in Cisco Unified Communications Manager Security Guide. A phone
URL
http://www.cisco.com/en/US/products/ps6951/index.html
http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/net
working_solutions_package.html
http://cisco.com/en/US/products/hw/switches/index.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_software_category_home.html
Understanding Phone Configuration Files
Table 2-2. These documents
"Configuring Encrypted Phone
2-5