Cisco Cisco Unified Communications System Release 6.1 White Paper

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Cisco Unified IP Phones: Cisco EnergyWise
Deployment Considerations
Document ID: 110319
Contents
Introduction
 Telephony Services
 Emergency Services
      Power Disconnection
      Disconnected Power
      Powering Up
 Network Services
      Loss of PC Port Network Services
 Cisco Unified IP Phone−Based Features
 Call Handling
 Call Interruption
 Serviceability Impact
 Recovery
 Security Status of an EnergyWise Phone
 Administration and Configuration
 Related Information
Introduction
Understanding and controlling energy usage is a focus of businesses worldwide. Cisco EnergyWise, an
innovative architecture which is added to existing Cisco Catalyst switching portfolio, promotes
company−wide sustainability by reducing energy consumption across an entire corporate infrastructure.
Cisco EnergyWise architecture can power off devices powered via Power Over Ethernet (PoE). You can
power off devices based on a preconfigured schedule, or based on configurable thresholds if using
EnergyWise aware network management software. Devices managed via this technology include Cisco
Unified IP Phones, Cisco Aironet Access Points, Cisco Video Surveillance IP Cameras and other
PoE−compatible devices.
Because unplanned power outages are a normal occurrence, recovery from such an event has always been a
focus of Cisco product testing. Cisco takes great care to ensure the complete and timely restoration of service
after the device is powered on. When a phone is powered down using the EnergyWise technology, the event is
indistinguishable from an unplanned event from the device perspective, and the devices recover via the
normal processes that are in place today.
This document focuses primarily on the Cisco Unified Communications System that EnergyWise impacts.
You can see a complete overview of the Cisco EnergyWise architecture at Cisco EnergyWise.