2-11
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
Chapter2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding the Phone Startup Process
5. Accessing a TFTP
Server.
In addition to assigning an IP address, the DHCP
server directs the Cisco UnifiedIP 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.
Note You can also assign an alternative TFTP
server to use instead of the one assigned
by DHCP.
•Network
Configuration
Menu, page 4-7.
•Resolving Startup
Problems,
page 9-2.
6. Requesting the CTL
file.
The TFTP server stores the certificate trust list
(CTL) file. This file contains a list of Cisco
UnifiedCallManagers 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
UnifiedCallManager.
For more information,
refer to Cisco
Unified CallManager
Security Guide
Table2-4 Cisco Unified IP Phone Startup Process (continued)
Step Description Related Topics