Options section on page 4-3 for details

Chapter 9 Troubleshooting and Maintenance

			General Troubleshooting Tips
Table 9-2	Cisco Unified IP Phone Troubleshooting (continued)

Summary		Explanation

Moving a network connection		If you are powering your phone through the network connection,
from the phone to a workstation		you must be careful if you decide to unplug the phone’s network
		connection and plug the cable into a desktop computer.

		Caution	The computer’s network card cannot receive power
			through the network connection; if power comes through
			the connection, the network card can be destroyed. To
			protect a network card, wait 10 seconds or longer after
			unplugging the cable from the phone before plugging it
			into a computer. This delay gives the switch enough time
			to recognize that there is no longer a phone on the line
			and to stop providing power to the cable.


Changing the telephone		By default, the network configuration options are locked to prevent
configuration		users from making changes that could impact their network
		connectivity. You must unlock the network configuration options
		before you can configure them. See the “Unlocking and Locking
		Options” section on page 4-3for details.

LCD display issues		If the display appears to have rolling lines or a wavy pattern, it might
		be interacting with certain types of older fluorescent lights in the
		building. Moving the phone away from the lights, or replacing the
		lights, should resolve the problem.

Dual-Tone Multi-Frequency		When you are on a call that requires keypad input, if you press the
(DTMF) delay		keys too quickly, some of them might not be recognized.

Codec mismatch between the		The RxType and the TxType statistics show the codec that is being
phone and another device		used for a conversation between this Cisco Unified IP phone and the
		other device. The values of these statistics should match. If they do
		not, verify that the other device can handle the codec conversation
		or that a transcoder is in place to handle the service.
		See the “Call Statistics Screen” section on page 7-13for
		information about displaying these statistics.

Sound sample mismatch		The RxSize and the TxSize statistics show the size of the voice
between the phone and another		packets that are being used in a conversation between this
device		Cisco Unified IP phone and the other device. The values of these
		statistics should match.
		See the “Call Statistics Screen” section on page 7-13for
		information about displaying these statistics.

Gaps in voice calls		Check the AvgJtr and the MaxJtr statistics. A large variance
		between these statistics might indicate a problem with jitter on the
		network or periodic high rates of network activity.
		See the “Call Statistics Screen” section on page 7-13for
		information about displaying these statistics.

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

OL-15299-01		9-11
OL-15299-01		9-11

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.

Cisco Systems 7971G-GE, 7970G manual Options section on page 4-3 for details

Models: 7970G 7971G-GE

Summary

Options” section on page 4-3for details.

See the “Call Statistics Screen” section on page 7-13for

information about displaying these statistics.

7970G, 7971G-GE specifications