Power Guidelines; Power Outage - Cisco 7911G - IP Phone VoIP Administration Manual

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network

Power Guidelines

Table 2-1 Guidelines for Powering the Cisco Unified IP Phones 7906G and 7911G
Power Type
External power—
Provided through a Cisco
external power supply.
External power—
Provided through the
Cisco Unified IP Phone
Power Injector.
PoE power—Provided by
a switch through the
Ethernet cable attached to
the phone.

Power Outage

Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
Table 2-1 provides guidelines that apply to external power and to PoE power for
the Cisco Unified IP Phones 7906G and 7911G.
Guidelines
The Cisco Unified IP Phone Series use the CP-PWR-CUBE-3 power
supply.
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 phone.
The Cisco Unified IP Phones 7906G and 7911G support both Cisco
•
inline power and IEEE 802.3af Power over Ethernet.
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.
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.
Providing Power to the Cisco Unified IP Phones 7906G and 7911G
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