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Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager
OL-14029-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Cisco Unified IP Phone
For more information, see the
Cisco Unified IP Phone Power Injector Installation
Guide
at the following location:
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_installation_guide
09186a00806b0761.html
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 2-2
.
These documents provide information about the following topics:
•
Cisco switches that work with the Cisco Unified SIP Phone 3911
•
The Cisco Unified IOS releases that support bidirectional power negotiation
•
Other requirements and restrictions regarding power
Table 2-2
Related Documentation for Power
Document Topics
URL
Cisco Unified IP Phone
Power Injector
http://www.cisco.com/en/US/products/hw/phones/p
s379/prod_installation_guides_list.html
PoE Solutions
http://www.cisco.com/en/US/netsol/
ns340/ns394/ns147/ns412/networking_solutions_pa
ckage.html
Cisco Catalyst Switches
http://www.cisco.com/en/US/products/hw/switch-
es/tsd_products_support_category_home.html
Summary of Contents for 3911
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