Cisco Systems CP6921CK9 manual Power Guidelines, Power Outage, Power Type Guidelines

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 6921, 6941, and 6961.

Table 2-1	Guidelines for Powering the Cisco Unified IP Phone 6921, 6941, and 6961
Power Type		Guidelines
External power—Provided		The Cisco Unified IP Phone 6921, 6941, and 6961 use the CP-PWR-CUBE-3 power
through the CP-PWR-CUBE-3		supply.
external power supply.
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		• The Cisco Unified IP Phone 6921, 6941, and 6961 support Cisco inline PoE.
switch through the Ethernet		• The Cisco Unified IP Phone 6921, 6941, and 6961 support IEEE 802.3af Class 2
cable attached to the phone.
		power on signal pairs and spare pairs.
		• 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 6921, 6941, and 6961.
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.

Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)

2-4 OL-19025-01