Cisco 7912G Administration Guide - Page 45

Chapter 2 Preparing to Install the Cisco IP Phone on Your Network Understanding the Phone Startup Process Related Topics • Understanding the Phone Startup Process, page 2-4 • Providing Power to the Cisco IP Phone, page 2-9 • Resolving Startup Problems, page 6-12 Loading the Stored Phone Image The Cisco IP Phone has non-volatile Flash 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. Related Topics • Understanding the Phone Startup Process, page 2-4 • Resolving Startup Problems, page 6-12 Configuring VLAN If the Cisco IP Phone is connected to a Cisco Catalyst switch, the switch next informs the phone of the voice VLAN defined on the switch. The phone needs to know its VLAN membership before it can proceed with the Dynamic Host Configuration Protocol (DHCP) request for an IP address. Related Topics • Understanding the Phone Startup Process, page 2-4 • Modifying VLAN Settings, page 4-24 • Resolving Startup Problems, page 6-12 Obtaining an IP Address If the Cisco IP Phone is using DHCP to obtain an IP address, the phone queries the DHCP server to obtain one. If you are not using DHCP in your network, you must assign static IP addresses to each phone locally. Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G OL-6313-01 2-5