Cisco 8851, Administration Manual

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Guidelines Power type
Cisco IP Phones 8865 supports UPoE. Universal Power over
Ethernet (UPoE)
For information about Cisco IP Phone 8800 Key Expansion Module power requirements, see Key Expansion
Module Power Information, on page 91 .
The documents in the following table provide more information on the following topics:
• Cisco switches that work with Cisco IP Phones
• Cisco IOS releases that support bidirectional power negotiation
• Other requirements and restrictions about power
Table 5: Additional Information
URL Document topics
http://www.cisco.com/c/en/us/solutions/enterprise-networks/
power-over-ethernet-solutions/index.html
PoE Solutions
http://www.cisco.com/c/en/us/solutions/enterprise-networks/
upoe/index.html UPoE
http://www.cisco.com/c/en/us/products/switches/index.html
Cisco Catalyst Switches
http://www.cisco.com/c/en/us/products/routers/index.html
Integrated Service Routers
http://www.cisco.com/c/en/us/products/ios-nx-os-software/
index.html
Cisco IOS Software
Power Outage
Your access to emergency service through the phone requires that the phone receive power. If a power
interruption occurs, service or emergency calling service dialing does not function until power is restored. If
a power failure or disruption occurs, you may need to reset or reconfigure the equipment before you can use
service or emergency calling service dialing.
Power Reduction
You can reduce the amount of energy that the Cisco IP Phone consumes by using Power Save mode.
Power Save
In Power Save mode, the backlight on the screen is not lit when the phone is not in use. The phone
remains in Power Save mode until the user lifts the handset or presses any button. Set up each phone
to enable or disable Power Save settings.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
13
Phone Power Requirements