Cisco Systems OL-14587-01 manual Understanding the Phone Startup Process

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

Understanding the Phone Startup Process

For more information about how the phone interacts with the TFTP server, refer to the Cisco Unified Communications Manager System Guide, “Cisco TFTP” chapter.

Understanding the Phone Startup Process

When connecting to the VoIP network, the Cisco Unified IP Phone goes through a standard startup process, as described in Table 2-3. Depending on your network configuration, not all of these process steps may occur on your Cisco

Unified IP Phone.

Table 2-3		Cisco Unified IP Phone Startup Process
Process Step and Purpose			Related Topics
Step 1	Obtaining Power from the Switch		See the “Providing Power to the Phone”
	If a phone is not using external power, the switch		section on page 2-4.
	provides in-line power through the Ethernet cable		See the “Resolving Startup Problems”
	attached to the phone.		section on page 9-2.
Step 2	Loading the Stored Phone Image		See the “Resolving Startup Problems”
	The Cisco Unified IP Phone has non-volatile Flash		section on page 9-2.
	memory in which it 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.
Step 3	Configuring VLAN		See the “Network Configuration Menu”
	If the Cisco Unified IP Phone is connected to a		section on page 4-7.
	Cisco switch, the switch next informs the phone of		See the “Resolving Startup Problems”
	the voice VLAN defined on the switch port. The		section on page 9-2.
	phone needs to know its VLAN membership before
	it can proceed with the Dynamic Host
	Configuration Protocol (DHCP) request for an IP
	address.

	Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.1
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