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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5
OL-23092-01
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 these topics:
• 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
Table 2-3 Related Documentation for Power
Document Topics URL
Cisco Unified IP Phone
Power Injector
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_installati
on_guides_list.html
PoE Solutions http://www.cisco.com/en/US/netsol/
ns340/ns394/ns147/ns412/networking_solutions_package.html
Cisco Catalyst Switches http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products
_support_series_home.html
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