Cisco Systems 8961 manual Power Guidelines, Power Outage, Reducing Power Consumption on the Phone

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

Providing Power to the Cisco Unified IP Phone

Power Guidelines

Table 2-1provides guidelines for powering the Cisco Unified IP Phone 8961, 9951, and 9971.

Table 2-1	Guidelines for Powering the Cisco Unified IP Phone 8961, 9951, and 9971
Power Type		Guidelines
External power—Provided		The Cisco Unified IP Phone 8961, 9951, and 9971 use the CP-PWR-CUBE-4 power
through the CP-PWR-CUBE-4=		supply.
external power supply.		Note You must use the CP-PWR-CUBE-4 when you deploy the Cisco Unified IP phone
		9971 on a wireless Network.
External power—Provided		The Cisco Unified IP Phone Power Injector may be used with any Cisco Unified IP Phone.
through the Cisco Unified IP		Functioning as a midspan device, the injector delivers inline power to the attached phone.
Phone Power Injector.		The Cisco Unified IP Phone Power Injector is connected between a switch port and the IP
		Phone, and supports a maximum cable length of 100m between the unpowered switch and
		the IP Phone.
PoE power—Provided by a		• Cisco Unified IP Phone 8961, 9951, and 9971 support IEEE 802.3af Class 3 power on
switch through the Ethernet		signal pairs and spare pairs.
cable attached to the phone.		• Cisco Unified IP Phone 8961, 9951, and 9971 support IEEE 802.3at for external
		add-on devices.
		• To ensure uninterruptible operation of the phone, make sure that the 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.
External power—Provided		The inline power patch panel WS-PWR-PANEL is compatible with the Cisco Unified
through inline power patch		IP Phone 8961, 9951, and 9971.
panel WS-PWR-PANEL

Power Outage

Your accessibility to emergency service through the phone is dependent on the phone being powered. If there is an interruption in the power supply, Service and Emergency Calling Service dialing will not function until power is restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before using the Service or Emergency Calling Service dialing.

Reducing Power Consumption on the Phone

You can reduce the amount of energy that the Cisco Unified IP Phone consumes by scheduling when the phone goes into power save mode. 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. In the Phone Configuration page on Cisco Unified Communications Administration, configure the following parameters.

•Days Display Not Active—Specify the days that the backlight remains inactive.

•Display on Time—Schedule the time of day that the backlight automatically activates. on the days listed in the off schedule.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

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