Cisco Systems 8.6 manual Power Guidelines, Power Outage, Power Type Guidelines

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

Providing Power to the Cisco Unified IP Phones

Power Guidelines

Table 2-1provides guidelines for powering the Cisco Unified IP Phones.

Table 2-1	Guidelines for Powering the Cisco Unified IP Phones
Power Type		Guidelines
External power—Provided		• The Cisco Unified IP Phones 7962G, 7942G, 7961G, and 7941G use the
through the CP-PWR-CUBE-3		CP-PWR-CUBE-3 power supply.
external power supply.		• The Cisco Unified IP Phones 7961G-GE and 7941G-GE use the CP-PWR-CUBE-3
		external power supply only.
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 Phones 7962G, 7942G, 7961G, and 7941G support Cisco inline
switch through the Ethernet		PoE, but the Cisco Unified IP Phones 7961G-GE, and 7941G-GE do not.
cable attached to the phone.		• The Cisco Unified IP Phones 7962G and 7942G support IEEE 802.3af Class 2 power
		on signal pairs and spare pairs. The Cisco Unified IP Phones 7961G-GE, and
		7941G-GE are not compatible with Cisco switches that are not IEEE compliant.
		• 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.

Power Outage

Telephone emergency service access depends 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 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)

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