Cisco Systems 8961 manual Refer to Cisco Unified, Communications Manager Security

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network

Understanding the Phone Startup Process

Table 2-3	Cisco Unified IP Phone Startup Process (continued)
Task	Purpose	Related Topics
4.	Load the stored phone image.	•	Resolving Startup Problems,
	The Cisco Unified IP Phone has non-volatile Flash memory in which it		page 12-1.
	stores firmware images and user-defined preferences. At startup, the
	phone runs a bootstrap loader that loads a phone image stored in Flash
	memory. Using this image, the phone initializes its software and
	hardware.
5.	Configure the VLAN.	• Ethernet Setup Menu, page 7-4.
	If the Cisco Unified IP Phone is connected to a Cisco Catalyst switch,	•	Resolving Startup Problems,
	the switch next informs the phone of the voice VLAN defined on the		page 12-1.
	switch. The phone needs to know its VLAN membership before it can
	proceed with the Dynamic Host Configuration Protocol (DHCP)
	request for an IP address.
6.	Obtain an IP address.	• Ethernet Setup Menu, page 7-4.
	If the Cisco Unified IP Phone is using DHCP to obtain an IP address,	•	Resolving Startup Problems,
	the phone queries the DHCP server to obtain one. If you are not using		page 12-1.
	DHCP in your network, you must assign static IP addresses to each
	phone locally.
7.	Requesting the CTL file.	Refer to Cisco Unified
	The TFTP server stores the CTL file. This file contains the certificates	Communications Manager Security
	necessary for establishing a secure connection between the phone and	Guide, Configuring the Cisco CTL
		Client.
	Cisco Unified CM.
8.	Requesting the ITL file.	See the “Preparing to Install the Cisco
	The phone requests the ITL file after it requests the CTL file. The ITL	Unified IP Phone on Your Network”
	file contains the certificates of the entities that the phone can trust. The	chapter.
	certificates are used for authenticating a secure connection with the	See the “Troubleshooting and
	servers or authenticating a digital signature signed by the servers. The	Maintenance” chapter.
	ITL file is supported on the Cisco Unified CM 8.5 and later.
9.	Access a TFTP server.	• Ethernet Setup Menu, page 7-4.
	In addition to assigning an IP address, the DHCP server directs the	•	Resolving Startup Problems,
	Cisco Unified IP Phone to a TFTP Server. If the phone has a statically		page 12-1.
	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.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

2-8 OL-20861-01