Cisco Unified IP Phones and Your Network
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 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 phone (native
Isolating the phones on a separate, auxiliary VLAN increases 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 switch
information at this URL:
http://cisco.com/en/US/products/hw/switches/index.html
Related Topics
Phone Startup Process, on page 6
Network Configuration Menu
Cisco Unified IP Phone Power
The Cisco Unified IP Phones 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.
When you install a phone that is powered with external power, connect the power supply to the phone
Note
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.
The following sections provide more information about powering a phone.
Power Guidelines
The following table provides guidelines for powering the Cisco Unified IP Phones.
Table 1: Power Guidelines for the Cisco Unified IP Phones
Power type
External power: Provided
through the CP-PWR-CUBE-3
external power supply.
VLAN)
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco Unified
Guidelines
The Cisco Unified IP Phones 7941G, 7942G, 7961G, and 7962G use the
CP-PWR-CUBE-3 power supply
The Cisco Unified IP Phones 7941G-GE and 7961G-GE use the
CP-PWR-CUBE-3 external power supply only.
Communications Manager 9.0 (SCCP and SIP)
Cisco Unified IP Phone Power
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