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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
OL-15498-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Cisco Unified IP Phone
These sections provide more information about powering a phone:
• Power Guidelines, page 2-4
• Power Outage, page 2-4
• Obtaining Additional Information about Power, page 2-4
Power Guidelines
Table 2-1 provides guidelines for powering the Cisco Unified IP Phone 7960G and 7940G.
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.
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 IOS releases that support bidirectional power negotiation
• Other requirements and restrictions regarding power