Cisco 6921 Administration Guide

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Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
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Chapter
Enabling EnergyWise on the Cisco Unified IP Phone 6921, 6941, 6945, and 6961
Enabling EnergyWise on the Cisco Unified IP Phone 6921, 6941,
6945, and 6961
To reduce power consumption, you can configure the phone to sleep (power down) and wake (power up)
if your system includes an EnergyWise controller, for example, a Cisco Switch with the EnergyWise
feature enabled.
You configure settings in Cisco Unified Communications Manager Administration to enable
EnergyWise and configure sleep and wake times. These parameters are closely tied to the phone display
configuration parameters.
When EnergyWise is enabled and a sleep time is set, the phone sends a request to the switch to wake it
up at the configured time. The switch sends back either an acceptance or a rejection of the request. If the
switch rejects the request or if the switch does not reply, the phone does not power down. If the switch
accepts the request, the idle phone goes to sleep, reducing its power consumption to a predetermined
level. A phone that is not idle sets an idle timer, and goes to sleep after the timer expires.
The user can wake up the phone by pressing the Select key. At the scheduled wake time, the system
restores power to the phone, waking it up.

Cisco 6921 Specifications

General

Brand	Cisco
Model	6921
Category	IP Phone
Language	English