Cisco 7971G-GE - IP Phone VoIP Préparation de l'installation - Page 6

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Cisco 7971G-GE - IP Phone VoIP Préparation de l'installation

Providing Power to the Phone

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.

Obtaining Additional Information about Power

For related information about power, refer to the documents shown in

provide information about these topics:

•

Table 2-3

Document Topics

Cisco Unified IP Phone

Power Injector

PoE Solutions

Cisco Catalyst Switches

Integrated Service Routers

Cisco IOS Software

Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5

2-6

Cisco switches that work with the Cisco Unified IP Phones 7975G, 7971G-GE, 7970G, 7965G, and

7945G

The Cisco IOS releases that support bidirectional power negotiation

Other requirements and restrictions regarding power