Understanding the Phone Startup Process

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

When connecting to the VoIP network, the Cisco Unified IP Phone goes through a standard startup process that is composed of several steps, as described in Table 2-1. Depending on your specific network configuration, not all of these steps may occur on your Cisco Unified IP Phone.

Table 2-1 Cisco Unified IP Phone Startup Process (continued)

Step	Description	Related Topics

1. Obtaining Power	You can connect the Cisco Unified IP Phone to a	•	Providing Power to
from the Switch.	Cisco Catalyst switch with one of the modules that		the Cisco Unified
	provides power to the phone (WS-X6348-RJ45V).		IP Phone, page 2-4.
	If you use this optional configuration, the phone	•	Resolving Startup
	receives phantom power and powers up when you		Problems,
	connect the Cisco Unified IP Phone to the switch.		page 8-2.
	The phone then sends Cisco Discovery Protocol
	(CDP) notifications to the switch indicating that it
	is ready to receive CDP packets and indicating the
	power requirement for the phone. The switch
	allocates power and sends it over the network
	cable.

2. Loading the Stored	The Cisco Unified IP Phone has non-volatile Flash	Resolving Startup
Phone Image.	memory in which it stores firmware images and	Problems, page 8-2.
	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.

3. Configuring VLAN.	If the Cisco Unified IP Phone is connected to a	•	Network
	Cisco Catalyst switch, the switch next informs the		Configuration
	phone of the voice VLAN defined on the switch.		Menu Options,
	The phone needs to know its VLAN membership		page 4-3.
	before it can proceed with the Dynamic Host	•	Resolving Startup
	Configuration Protocol (DHCP) request for an IP	•	Resolving Startup
	Configuration Protocol (DHCP) request for an IP		Problems,
	address.		Problems,
	address.		page 8-2.
			page 8-2.

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 4.2, Cisco Unified IP Phones

	OL-8555-01	2-9

OL-8555-01 specifications

Cisco Systems OL-8555-01 is a comprehensive course designed for IT professionals seeking to enhance their understanding of Cisco Unified Computing System (UCS) and Data Center networking technologies. This course focuses on the configuration, management, and troubleshooting of UCS environments and is targeted towards system administrators, engineers, and network professionals involved in data center operations.

One of the main features of the OL-8555-01 course is its emphasis on the fundamental concepts of UCS architecture. Participants are introduced to the UCS components, including blade servers, chassis, Fabric Interconnects, and the integrated management platform, UCS Manager. Understanding these components is critical for managing virtualized environments effectively, which is a significant aspect of modern data center management.

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Overall, OL-8555-01 is a valuable resource for IT professionals aiming to deepen their technical expertise in Cisco's UCS ecosystem. The combination of theoretical knowledge and hands-on practice prepares participants for real-world scenarios, allowing them to make informed decisions about their data center environments. Completing this course not only enhances career prospects but also empowers individuals to drive innovation and efficiency in modern data centers.