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

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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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OL-14587-01

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Contents A P T E R OL-14587-01 Vlan Providing Power to the Phone Power Outage Power GuidelinesUnderstanding Phone Configuration Files Obtaining Additional Information about PowerPage Understanding the Phone Startup Process Process Step and Purpose Related TopicsRefer to the Cisco Unified Communications See the Understanding Phone Method Address? Adding Phones with Auto-Registration Adding Phones with Auto-Registration and Taps Adding Phones with BAT MAC Address of a Cisco Unified IP Phone section onDetermining the MAC Address of a Cisco Unified IP Phone Determining the MAC Address of a Cisco Unified IP Phone