Cisco 8800 Series, Руководство пользователя

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Table 91: 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.
Power Negotiation Over LLDP
The phone and the switch negotiate the power that the phone consumes. Cisco IP Phone operates at multiple
power settings, which lowers power consumption when less power is available.
After a phone reboots, the switch locks to one protocol (CDP or LLDP) for power negotiation. The switch
locks to the first protocol (containing a power Threshold Limit Value [TLV]) that the phone transmits. If the
system administrator disables that protocol on the phone, the phone cannot power up any accessories because
the switch does not respond to power requests in the other protocol.
Cisco recommends that Power Negotiation always be enabled (default) when connecting to a switch that
supports power negotiation.
If Power Negotiation is disabled, the switch may disconnect power to the phone. If the switch does not support
power negotiation, disable the Power Negotiation feature before you power up accessories over PoE. When
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
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Technical Details
Power Outage