Cisco Systems 7926G, 7925G-EX manual Mos Lqk

Chapter 8 Viewing Security, Device, Model, Status, and Call Statistics Information on the Phone

Viewing the Phone Status Menu

Table 8-6 Call Statistics Items (continued)

Item

Description

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 “Monitoring the Voice Quality of Calls” section on
	page 10-11.
	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.729 A /AB gives 3.7
MOS LQK Version	Version of the Cisco proprietary algorithm used to calculate MOS
	LQK scores.
CumConcealRatio	Total number of concealment frames divided by total number of
	speech frames received from start of the voice stream.
IntConcealRatio	Ratio of concealment frames to speech frames in preceding
	3-second interval of active speech. If using voice activity detection
	(VAD), a longer interval might be required to accumulate 3 seconds
	of active speech.
MaxConcealRatio	Highest interval concealment ratio from start of the voice stream.
Conceal Secs	Number of seconds that have concealment events (lost frames) from
	the start of the voice stream (includes severely concealed seconds).
SevConcealSecs	Number of seconds that have more than 5 percent concealment
	events (lost frames) from the start of the voice stream.

Related Topics

•Viewing the Status Messages, page 8-9

•Viewing Network Statistics, page 8-12

•Viewing Firmware Versions, page 8-16

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide

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