Cisco 8800 Series Administration Manual page 32

Phone Power Requirements
Pin Number
4
5
6
7
8
Note
Phone Power Requirements
The Cisco IP Phone can be powered with external power or with Power over Ethernet (PoE). A separate power
supply provides external power. The switch can provide PoE through the phone Ethernet cable.
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.
For more information on your phone's power requirements, consult your phone's data sheet.
When you install a phone that is powered with external power, connect the power supply 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.
Table 4: Guidelines for Cisco IP Phone 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)
For information about Cisco IP Phone 8800 Key Expansion Module power requirements, see
Module Power Information, on page
The documents in the following table provide more information on the following topics:
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
16
BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and
Data D respectively.
109.
Function
BI_DD+
BI_DD-
BI_DA-
BI_DC+
BI_DC-
Guidelines
The Cisco IP Phone uses 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.
The switch requires a backup power supply for
uninterruptible operation of the phone
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.
Cisco IP Phones 8865 supports UPoE.
About the Cisco IP Phone
Key Expansion