Cisco Systems OL-8148-01 manual Power Guidelines, Phone Power Consumption and Display Brightness

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network

Providing Power to the Phone

•Power Outage, page 2-7

•Obtaining Additional Information about Power, page 2-7

Power Guidelines

Table 2-1provides guidelines that apply to external power and to PoE power for phones the Cisco Unified IP Phone 7970 Series.

Table 2-1 Guidelines for Powering the Cisco Unified IP Phone 7970 Series

Power Type	Guidelines
External power—	• The Cisco Unified IP Phone 7970G and 7971G-GE use the
Provided through the	CP-PWR-CUBE-3 power supply.
CP-PWR-CUBE-3
external power supply
PoE power—Provided by	• The inline power patch panel WS-PWR-PANEL is not compatible
a switch through the	with the Cisco Unified IP Phone.
Ethernet cable attached to	• To ensure uninterruptible operation of the phone, make sure that the
the phone
	switch has a backup power supply.
	• Make sure that the CatOS or IOS version running on your switch
	supports your intended phone deployment. Refer to the documentation
	for your switch for operating system version information.

Phone Power Consumption and Display Brightness

The power consumed by a phone depends on its power configuration. See Table 2-1for a power configuration overview. See Table 2-2for the maximum power consumed by a phone for each configuration option and the correlating phone screen brightness level.

Note Power consumption values shown in the table include power losses in the cable that connects the phone to the switch.

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones

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