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

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 Table 2-3. These documents provide information about the following topics:

Cisco switches that support the Cisco Unified IP Phones 7970G/7971G-GE

Cisco IOS releases that support bidirectional power negotiation

Other requirements and restrictions regarding power

Table 2-3 Related Information About Power

Document Topics

URL

 

 

Cisco Unified IP Phone Power Injector

http://www.cisco.com/en/US/products

 

/hw/phones/ps379/prod_installation_g

 

uides_list.html

 

 

PoE Power Solutions

http://www.cisco.com/en/US/netsol/

 

ns340/ns394/ns147/ns412/networking

 

_solutions_package.html

 

 

Cisco Catalyst Switches

http://www.cisco.com/univercd/cc/td/

 

doc/product/lan/index.htm

 

 

Integrated Service Routers

http://www.cisco.com/en/US/products

 

/hw/routers/index.html

 

 

Cisco IOS Software

http://www.cisco.com/en/US/products

 

/sw/iosswrel/products_ios_cisco_ios_

 

software_category_home.html

 

 

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones

 

OL-11524-01

2-7

 

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Cisco Systems 7970G manual Power Outage, Obtaining Additional Information about Power