Cisco 7970G Administration Guide - Page 56

Providing Power to the Phone Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network • Network security may indicate a need to isolate the VLAN voice traffic from the VLAN data traffic. You can resolve these issues by isolating the voice traffic onto a separate VLAN. The switch port that the phone is connected to would be configured to have separate VLANs for carrying: • Voice traffic to and from the IP phone (auxiliary VLAN, on the Cisco Catalyst 6000 series, for example) • Data traffic to and from the PC connected to the switch through the access port of the IP phone (native VLAN) Isolating the phones on a separate, auxiliary VLAN improves the quality of the voice traffic and allows a large number of phones to be added to an existing network where there are not enough IP addresses for each phone. For more information, refer to the documentation included with a Cisco switch. You can also access related documentation at this URL: http://www.cisco.com/en/US/products/hw/switches/tsd_products_support_categ ory_home.html Related Topics • Understanding the Phone Startup Process, page 2-10 • Network Configuration Menu, page 4-7 Providing Power to the Phone Models in the Cisco Unified IP Phone 7970 Series can be powered with external power or with Power over Ethernet (PoE). External power is provided through a separate power supply. PoE is provided by a switch through the Ethernet cable attached to a phone. Note When you install a phone that is powered with external power, connect the power supply to the phone and to a power outlet before you connect the Ethernet cable to the phone. When you remove a phone that is powered with external power, disconnect the Ethernet cable from the phone before you disconnect the power supply. Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1 2-4 OL-14626-01