Cisco Systems 8945, 8941 manual Refer to the Cisco Unified Communications Manager

Chapter

Understanding the Phone Startup Process

Table 2-3	Cisco Unified IP Phone Startup Process (continued)
Task	Purpose	Related Topics
4.	Obtaining an IP Address	• Network Setup Menu, page 4-4.
	If the Cisco Unified IP Phone is using DHCP to obtain	• Resolving Startup Problems, page 9-1.
	an IP address, the phone queries the DHCP server to
	obtain one. If you are not using DHCP in your
	network, you must assign static IP addresses to each
	phone locally.
5.	Accessing a TFTP Server	• Network Setup Menu, page 4-4.
	In addition to assigning an IP address, the DHCP	• Resolving Startup Problems, page 9-1.
	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.
	Note You can also assign an alternative TFTP server
	to use instead of the one assigned by DHCP.
6.	Requesting the CTL file	Refer to the Cisco Unified Communications Manager
	The TFTP server stores the certificate trust list (CTL)	Security Guide, “Configuring the Cisco CTL Client”
	file. The CTL file contains the certificates necessary	chapter.
	for establishing a secure connection between the
	phone and Cisco Unified CM.
7.	Requesting the Configuration File	• Adding Phones to the Cisco Unified CM Database,
	The TFTP server has configuration files, which define	page 2-8.
	parameters for connecting to Cisco Unified CM and	• Resolving Startup Problems, page 9-1.
	other information for the phone.
8.	Contacting Cisco Unified CM	Resolving Startup Problems, page 9-1.
	The configuration file defines how the Cisco
	Unified IP Phone communicates with Cisco
	Unified CM 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 CM on the list.
	If the phone was manually added to the database,
	Cisco Unified CM identifies the phone. If the phone
	was not manually added to the database and
	auto-registration is enabled in Cisco Unified CM, the
	phone attempts to auto-register itself in the Cisco
	Unified CM database.

Cisco Unified IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)

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