Voice Quality Metrics, Mos Lqk | Cisco Systems 7970G, 7971G-GE

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone

Status Menu

		Table 7-6	Call Statistics Items (continued)

		Item		Description

		Sender Size		Size of voice packets, in milliseconds, in the transmitting voice
				stream.

		Rcvr Packets		Number of RTP voice packets received since voice stream was
				opened.
				Note This number is not necessarily identical to the number of
					RTP voice packets received since the call began because the
					call might have been placed on hold.

		Sender Packets		Number of RTP voice packets transmitted since voice stream was
				opened.
				Note This number is not necessarily identical to the number of
					RTP voice packets transmitted since the call began because
					the call might have been placed on hold.

		Avg Jitter		Estimated average RTP packet jitter (dynamic delay that a packet
				encounters when going through the network) observed since the
				receiving voice stream was opened.

		Max Jitter		Maximum jitter observed since the receiving voice stream was
				opened.

		Rcvr Discarded		Number of RTP packets in the receiving voice stream that have been
				discarded (bad packets, too late, and so on).
				Note The phone will discard payload type 19 comfort noise
					packets that are generated by Cisco Gateways, which will
					increment this counter.

		Rcvr Lost Packets		Missing RTP packets (lost in transit).

		Voice Quality Metrics

		MOS LQK		Score that is an objective estimate of the mean opinion score (MOS)
				for listening quality (LQK) that rates from 5 (excellent) to 1 (bad).
				This score is based on audible concealment events due to frame loss
				in the preceding 8-second interval of the voice stream. For more
				information, see the “Monitoring the Voice Quality of Calls” section
				on page 9-15.
				Note The MOS LQK score can vary based on the type of codec
					that the Cisco Unified IP Phone uses.

		Avg MOS LQK		Average MOS LQK score observed for the entire voice stream.

		Min MOS LQK		Lowest MOS LQK score observed from start of the voice stream.

		Max MOS LQK		Baseline or highest MOS LQK score observed from start of the
				voice stream.
				These codecs provide the following maximum MOS LQK score
				under normal conditions with no frame loss:
				•	G.711 gives 4.5
				•	G.722 gives 4.5
				•	G.728/iLBC gives 3.9
				• G.729 A/AB gives 3.8

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


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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 7970G manual Voice Quality Metrics, Mos Lqk, That the Cisco Unified IP Phone uses

Models: 7970G 7971G-GE

Voice Quality Metrics

MOS LQK

in the preceding 8-second interval of the voice stream. For more

that the Cisco Unified IP Phone uses.

OL-15299-01

7970G, 7971G-GE specifications