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

 

 

 

 

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Cisco Systems OL-8148-01 manual Understanding the Phone Startup Process, Process Step Description Related Topics