Cisco 7911G - IP Phone VoIP Administration Manual page 64

Understanding the Phone Startup Process
Table 2-3 Cisco Unified IP Phone Startup Process (continued)
Step
Accessing a TFTP
5.
Server.
6. Requesting the
CTL file.
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
2-10
Chapter 2
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.
Preparing to Install the Cisco Unified IP Phone on Your Network
Related Topics
See the "Network
Configuration Menu"
section on page 4-7.
See the "Resolving
Startup Problems"
section on page 9-2.
Refer to the
Cisco Unified Communi
cations Manager
Security Guide,
"Configuring the Cisco
CTL Client" chapter.
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