Cisco 7970G - IP Phone VoIP Administration Manual page 63

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Table 2-4 Cisco Unified IP Phone Startup Process (continued)
Process Step
5. Accessing a TFTP
Server.
6. Requesting the CTL
file.
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Description
In addition to assigning an IP address, the
DHCP server directs the Cisco
Unified IP Phone to a TFTP Server. If the phone
has a statically defined IP address, you must
configure the TFTP server locally on the phone;
the phone then contacts the TFTP server
directly.
You can also assign an alternative TFTP
Note
server to use instead of the one assigned
by DHCP.
The TFTP server stores the certificate trust list
(CTL) file. This file contains a list of Cisco
Unified Communications Managers and TFTP
servers that the phone is authorized to connect
to. It also contains the certificates necessary for
establishing a secure connection between the
phone and Cisco Unified Communications
Manager.
Understanding the Phone Startup Process
Related Topics
See the "Network
Configuration Menu"
section on page
See the "Resolving
Startup Problems" section
on page 9-2.
Refer to Cisco
Unified Communications
Manager Security Guide,
"Configuring the Cisco
CTL Client" chapter.
4-7.
2-11