Cisco Systems OL-8148-01 manual Understanding the Phone Startup Process

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

Understanding the Phone Startup Process

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 2-4. Depending on your specific network configuration, not all of these process steps may occur on your Cisco Unified IP Phone.

Table 2-4 Cisco Unified IP Phone Startup Process

Process Step	Description	Related Topics
1. Obtaining Power	If a phone is not using external power, the switch	See the “Providing
from the Switch	provides in-line power through the Ethernet cable	Power to the Phone”
	attached to the phone.	section on page 2-4.
		See the “Resolving
		Startup Problems”
		section on page 9-2.
2. Loading the Stored	The Cisco Unified IP Phone has non-volatile Flash	See the “Resolving
Phone Image	memory in which it stores firmware images and	Startup Problems”
	user-defined preferences. At startup, the phone	section on page 9-2.
	runs a bootstrap loader that loads a phone image
	stored in Flash memory. Using this image, the
	phone initializes its software and hardware.
3. Configuring VLAN	If the Cisco Unified IP Phone is connected to a	See the “Network
	Cisco switch, the switch next informs the phone of	Configuration Menu”
	the voice VLAN defined on the switch port. The	section on page 4-7.
	phone needs to know its VLAN membership	See the “Resolving
	before it can proceed with the Dynamic Host
		Startup Problems”
	Configuration Protocol (DHCP) request for an IP
		section on page 9-2.
	address.
4. Obtaining an IP	If the Cisco Unified IP Phone is using DHCP to	See the “Network
Address	obtain an IP address, the phone queries the DHCP	Configuration Menu”
	server to obtain one. If you are not using DHCP in	section on page 4-7.
	your network, you must assign static IP addresses	See the “Resolving
	to each phone locally.	Startup Problems”
		section on page 9-2.
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones
OL-8148-01			2-9