User's Manual

2-8
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-23091-01
Chapter 2 Preparing to Install the Cisco Unified IP Phones on Your Network
Adding Phones to the Cisco Unified Communications Manager Database
Adding Phones to the Cisco Unified Communications Manager
Database
Before installing the Cisco Unified IP Phones, you must choose a method for adding phones to the
Cisco
Unified Communications Manager database. These sections describe the methods:
• Adding Phones with Auto-Registration, page 2-9
7. Requesting the ITL file.
The phone requests the ITL file after it requests the
CTL file. The ITL file contains the certificates of the
entities that the phone can trust. The certificates are
used for authenticating a secure connection with the
servers or authenticating a digital signature signed by
the servers.
Refer to Cisco Unified Communications Manager
Security Guide,
Security by Default.
8. Requesting the Configuration File
The TFTP server has configuration files, which define
parameters for connecting to Cisco
Unified
Communications Manager and other
information for the phone.
• Adding Phones to the Cisco Unified
Communications Manager Database, page 2-8.
• Resolving Startup Problems, page 9-1.
9. Contacting Cisco Unified Communications Manager
The configuration file defines how the Cisco Unified
IP Phone communicates with Cisco Unified
Communications Manager and provides a phone with
its load ID. After obtaining the file from the TFTP
server, the phone attempts to make a connection to the
highest priority Cisco Unified Communications
Manager on the list. When security is implemented, if
the security profile of the phone is configured for
secure signaling (encrypted or authenticated), and the
Cisco Unified Communications Manager is set to
secure mode, the phone makes a TLS connection.
Otherwise, it makes a nonsecure TCP connection.
If the phone was manually added to the database,
Cisco Unified Communications Manager identifies
the phone. If the phone was not manually added to the
database and auto-registration is enabled in Cisco
Unified Communications Manager, the phone
attempts to auto-register itself in the Cisco Unified
Communications Manager database.
Note Auto-registration is disabled when you
configure the CTL client. In this case, the
phone must be manually added to the Cisco
Unified Communications Manager database.
• Resolving Startup Problems, page 9-1.
Table 2-3 Cisco Unified IP Phone Startup Process (continued)
Task Purpose Related Topics