Understanding How The Cisco Unified Ip Phone Interacts With Cisco Unified Communications Manager Express; Providing Power To The Cisco Unified Ip Phone - Cisco 6901 Administration Manual

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
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You can resolve these issues by isolating the voice traffic onto a separate VLAN. The switch port that
the phone connects to would be configured to have separate VLANs for carrying:
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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
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Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified
Communications Manager Express
The Cisco Unified Communications Manager Express (Unified CME) Version Negotiation feature
supports a SIS version in the supported tag. The Cisco Unified IP Phones use the supported tag to interact
with Cisco Unified Communications Manager Express and its supported SIS version.

Providing Power to the Cisco Unified IP Phone

The Cisco Unified IP Phone 6901 and 6911 can be powered with external power or with Power over
Ethernet (PoE). A separate power supply provides external power. A switch provides PoE through the
Ethernet cable attached to a phone.
Note When you install an externally powered phone, connect the power supply to the phone and to a power
outlet before you connect the Ethernet cable to the phone. When you remove an externally powered
phone, disconnect the Ethernet cable from the phone before you disconnect the power supply.
The following sections provide more information about powering a phone:
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Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
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The current VLANs might be configured on an IP subnet basis. However, additional IP addresses
might not be available to assign the phone to the same subnet as other devices connected to the same
port.
Data traffic present on the VLAN supporting phones might reduce the quality of VoIP traffic.
Network security may require isolation of the VLAN voice traffic from the VLAN data traffic.
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)
Understanding the Phone Startup Process, page 2-6
Configuring Settings on the Cisco Unified IP Phone, page 4-1
Power Guidelines, page 2-4
Power Outage, page 2-4
Obtaining Additional Information About Power, page 2-5
Providing Power to the Cisco Unified IP Phone
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