Cisco 7940G

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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SIP)
OL-15499-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Cisco Unified IP Phone
Power Guidelines
Table 2-1 provides guidelines for powering the Cisco Unified IP Phone 7960G and 7940G.
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 IP Phone 7960G and 7940G
• The Cisco Unified IOS releases that support bidirectional power negotiation
• Other requirements and restrictions regarding power
Ta b l e 2-1 Guidelines for Powering the Cisco Unified IP Phone 7960G and 7940G
Power Type Guidelines
External power— Provided through the
CP-PWR-CUBE-3 external power supply.
• The Cisco Unified IP Phones use the CP-PWR-CUBE-3 power supply.
PoE power—Provided by a switch through the
Ethernet cable attached to the phone.
• The Cisco Unified IP Phones support PoE.
• The inline power patch panel WS-PWR-PANEL is compatible with the
Cisco
Unified IP Phones.
• To ensure uninterruptible operation of the phone, make sure that the
switch has a backup power supply.
• Make sure that the CatOS or IOS version running on your switch
supports your intended phone deployment. Refer to the documentation
for your switch for operating system version information.
Ta b l e 2-2 Related Documentation for Power
Document Topics URL
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_s
upport_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_io
s_software_category_
home.html