Cisco 7962G Administration Guide - Page 43

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 7962G and 7942G go through a standard startup process that is described in Table 2-3. Depending on your specific network configuration, not all of these steps may occur on your Cisco Unified IP Phone. Table 2-3 Cisco Unified IP Phone Startup Process Configuration Step and Description Related Topics Step 1 Obtaining Power from the Switch If a phone is not using external power, the switch provides in-line power through the Ethernet cable attached to the phone. • Adding Phones to the Cisco Unified Communications Manager Database, page 2-8. • Resolving Startup Problems, page 9-2. Step 2 Loading the Stored Phone Image • Resolving Startup Problems, page 9-2. The Cisco Unified 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. Step 3 Configuring VLAN • Network Configuration Menu, page 4-5. If the Cisco Unified 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. • Resolving Startup Problems, page 9-2. Step 4 Obtaining an IP Address • Network Configuration Menu, page 4-5. If the Cisco Unified 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. • Resolving Startup Problems, page 9-2. Step 5 Accessing a TFTP Server • Network Configuration Menu, page 4-5. In addition to assigning an IP address, the DHCP server directs the Cisco Unified IP Phone to a TFTP Server. If the phone has a statically defined IP address, you must configure the TFTP server locally on the phone; the phone then contacts the TFTP server directly. • Resolving Startup Problems, page 9-2. Note You can also assign an alternative TFTP server to use instead of the one assigned by DHCP. OL-14625-01 Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 6.1 2-7