Cisco 7841 Installation Manual - Page 37

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Cisco 7841 Installation Manual
Phone Power Requirements
Table 3: Guidelines for Cisco IP Phone 8800 Series Power
Power Type
External power: Provided through the CP-
PWR-CUBE-4= external power supply
PoE power—Provided by a switch through
the Ethernet cable attached to the phone.
Universal Power over Ethernet (UPoE)
Table 4: Guidelines for Cisco IP Conference Phone 7832 Power
Power Type
PoE power—Provided by a switch through
the Ethernet cable attached to the phone.
External power—Provided through the
Cisco IP Conference Phone 7832 PoE
Midspan Cable and Cisco Power Cube 3
External power—Provided through the
Cisco IP Phone Power Injector
Guidelines
The Cisco IP Phone 8800 Series phones use the CP-PWR-CUBE-4
power supply.
Cisco IP Phones 8851, 8861, and 8865 support 802.3at PoE for
accessory use. For more information, consult your phone's data
sheet.
Cisco IP Phones 8861 and 8865 are PoE Class 4 devices and require
a switch or line card with Class 4 capabilities to support extra
features.
The switch requires a backup power supply for uninterruptible
operation of the phone. Make sure that the Cat OS or IOS version
that runs on your switch supports your intended phone deployment.
See the documentation for your switch for operating system version
information.
Cisco IP Phones 8865 support UPoE.
Guidelines
To ensure uninterruptible operation of the phone, make sure that the
switch has a backup power supply.
Make sure that the CatOS or IOS version that runs on your switch
supports your intended phone deployment. See the documentation
for your switch for operating system version information.
The midspan cable and power cube provide power to the Ethernet
cable.
When you install a phone that is powered with the midspan adapter,
connect the adapter to power before you connect the Ethernet cable
to the phone. When you remove a phone that uses the midspan
adapter, disconnect the Ethernet cable from the phone before you
remove the power from the adapter.
The power injector provides power to the Ethernet cable.
When you install a phone that is powered with the power injector,
connect the injector to power before you connect the Ethernet cable
to the phone. When you remove a phone that uses the injector,
disconnect the Ethernet cable from the phone before you remove
the power from the injector.
Installation Guide for Cisco IP Phone with Multiplatform Firmware
Technical Details
33