Power Outage; Power Reduction - Cisco 7800 Series Administration Manual

About the Cisco IP Phone
• Other requirements and restrictions about power
Document topics
PoE Solutions
Cisco Catalyst Switches
Integrated Service Routers
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 or EnergyWise
(Power Save Plus) mode.
Power Save
Note
Power Save Plus (EnergyWise)
Note
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 for the scheduled duration or until the user lifts the handset or presses any
button.
The Cisco IP Phone 7811 does not support Power Save because the phone screen does not have a backlight.
Set up each phone to enable or disable Power Save settings. You can configure the phones to dim the
backlight on a schedule.
The Cisco IP Phone supports Cisco EnergyWise (Power Save Plus) mode. When your network contains
an EnergyWise (EW) controller (for example, a Cisco switch with the EnergyWise feature enabled), you
can configure these phones to sleep (power down) and wake (power up) on a schedule to further reduce
power consumption.
The Cisco IP Phone 7811 does not support Power Save Plus.
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
URL
http://www.cisco.com/c/en/us/solutions/
enterprise-networks/power-over-ethernet-solutions/
index.html
http://www.cisco.com/c/en/us/products/switches/
index.html
http://www.cisco.com/c/en/us/products/routers/
index.html
http://www.cisco.com/c/en/us/products/
ios-nx-os-software/index.html
Power Outage
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