Cisco 7970G - IP Phone VoIP, Руководство администратора

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Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Phone
The following sections provide more information about powering a phone:
• Power Guidelines, page 2-5
•
Phone Power Consumption and Display Brightness, page 2-6
•
Power Outage, page 2-7
•
Obtaining Additional Information about Power, page 2-7
Power Guidelines
Table 2-1 provides guidelines that apply to external power and to PoE power for
phones the Cisco Unified IP Phone 7970 Series.
Table 2-1 Guidelines for Powering the Cisco Unified IP Phone 7970 Series
Power Type Guidelines
External power—
Provided through the
CP-PWR-CUBE-3
external power supply The Cisco Unified IP Phone Series uses the CP-PWR-CUBE-3 power
supply.
External power—
Provided through the
Cisco Unified IP Phone
Power Injector
The Cisco Unified IP Phone Power Injector may be used with any Cisco
Unified IP Phone. Functioning as a midspan device, the injector delivers
inline power to the attached phone. The Cisco Unified IP Phone Power
Injector is connected between a switch port and the IP Phone, and supports
a maximum cable length of 100m between the unpowered switch and the
IP Phone.
PoE power—Provided by
a switch through the
Ethernet cable attached to
the phone
•
The inline power patch panel WS-PWR-PANEL is not compatible
with the Cisco Unified IP Phone 7970 Series.
•
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.