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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
Chapter2 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 CiscoUnified IP Phones 7970G/7971G-GE
•Cisco IOS releases that support bidirectional power negotiation
•Other requirements and restrictions regarding power
Table2-3 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