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

Providing Power to the Phone

Phone Power Consumption and Display Brightness

The power consumed by a phone depends on its power configuration. See Table 2-1for a power configuration overview. See Table 2-2for the maximum power consumed by a phone for each configuration option and the correlating phone screen brightness level.

Note Power consumption values shown in the table include power losses in the cable that connects the phone to the switch.

Table 2-2

Power Consumption and Display Brightness for Power Configurations

 

 

 

 

 

 

 

 

 

 

Max. Power

 

 

 

 

Consumed from a

Phone Screen

Phone Model

 

Power Configuration

Switch

Brightness

 

 

 

 

 

Cisco Unified IP

 

Cisco prestandard PoE from a switch that supports a maximum of 7

6.3 W

Approx. 1/2

Phone 7970G

 

W power per port, with bidirectional power negotiation enabled

 

 

 

 

 

 

 

 

 

Cisco prestandard PoE from a Cisco Switch that supports 7 W or

6.3 W

Approx. 1/2

 

 

15.4 W power per port, without bidirectional power negotiation

 

 

 

 

 

 

 

 

 

IEEE 802.3af Class 3 power from a Cisco switch, without

6.3 W

Approx. 1/2

 

 

bidirectional power negotiation

 

 

 

 

 

 

 

 

 

IEEE 802.3af Class 3 power from a third-party switch

6.3 W

Approx. 1/2

 

 

 

 

 

 

 

IEEE 802.3af Class 3 power from a Cisco switch, with bidirectional

10.25 W

Full1

 

 

power negotiation enabled

 

 

 

 

 

 

 

 

 

Cisco prestandard PoE from a Cisco Switch that supports 15.4 W

10.25 W

Full

 

 

power per port, with bidirectional power negotiation enabled

 

 

 

 

 

 

 

 

 

External power

—

Full

 

 

 

 

 

Cisco Unified IP

 

IEEE 802.3af Class 3 power from a Cisco switch (with or without

15.4 W

Near full

Phone 7971G-GE

bidirectional power negotiation enabled) or from a third-party

 

 

 

 

switch

 

 

 

 

 

 

 

 

 

External power

—

Full

 

 

 

 

 

1. Starts at approximately 1/2 brightness, changes to full brightness when the phone negotiates additional power.

Note When a phone is powered with a method that does not support full brightness for the phone screen, the phone Brightness control (Settings > User Preferences > Brightness) does not allow you to set the brightness to the maximum value.

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.

Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 7.0

 

OL-15299-01

2-5

 

 

 

Page 42 Page 44
Page 43
Image 43
Cisco Systems 7971G-GE, 7970G manual Phone Power Consumption and Display Brightness, Power Outage, Max. Power, Phone Screen
Page 42 Page 44

7970G, 7971G-GE specifications

The Cisco Systems 7971G-GE is a sophisticated IP phone designed for enterprise communication, offering a range of features that enhance productivity and collaboration. As part of the Cisco Unified Communications portfolio, this phone is known for its impressive technology and reliable performance.

One of the main features of the 7971G-GE is its high-resolution color display. The 5-inch LCD screen provides users with a visually appealing and intuitive interface, allowing for easy navigation through menus and contacts. The phone supports up to six lines, making it ideal for users who require multiple lines for simultaneous calls. Users can effortlessly manage calls with the ability to switch between lines and access important call features like hold, transfer, and conference calling.

In terms of audio quality, the Cisco 7971G-GE is equipped with high-definition voice technology. This feature ensures crystal-clear sound during calls, reducing background noise and enhancing the clarity of conversations. The phone also supports wideband audio codecs, enabling a richer voice experience that is particularly valuable in business environments.

The phone is designed with user convenience in mind. It offers programmable buttons that can be customized to suit individual needs, allowing easy access to frequently used functions or contact lists. Additionally, the presence indicator feature lets users see the availability of their colleagues in real-time, promoting more effective communication and collaboration.

Networking capabilities are another strong point of the Cisco 7971G-GE. The phone supports both Power over Ethernet (PoE) and standard Ethernet connectivity. This enables easy deployment without the need for additional power outlets. Moreover, the device is compatible with various Cisco communication platforms, integrating seamlessly with existing Cisco infrastructure, which is essential for businesses looking to upgrade their communications systems.

Security is a crucial consideration for modern enterprises, and Cisco addresses this with robust encryption features that protect voice and video calls. The phone supports secure signaling and media encryption, ensuring that sensitive conversations remain confidential.

Overall, the Cisco Systems 7971G-GE is a feature-rich IP phone that combines advanced technology with user-friendly design. Its high-definition audio, customizable features, and seamless integration with Cisco networks make it a popular choice for businesses seeking to improve their communication systems. With its reliability and performance, the Cisco 7971G-GE continues to support effective collaboration in an increasingly connected world.
Top Page Image Contents