Cisco 7970G - IP Phone VoIP Administration Manual page 230

Streaming Statistics
Table 8-5
Item
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cumulative Conceal
Ratio
Interval Conceal Ratio Ratio of concealment frames to speech frames in
Max Conceal Ratio
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
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Chapter 8
Streaming Statistics Area Items (continued)
Description
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
Quality of Calls" section on page
The MOS LQK score can vary based on the
Note
type of codec that the Cisco Unified IP Phone
uses.
Average MOS LQK score observed for the entire voice
stream.
Lowest MOS LQK score observed from start of the
voice stream.
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
•
Version of the Cisco proprietary algorithm used to
calculate MOS LQK scores.
Total number of concealment frames divided by total
number of speech frames received from start of the
voice stream.
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.
Highest interval concealment ratio from start of the
voice stream.
Monitoring the Cisco Unified IP Phone Remotely
"Monitoring the Voice
9-22.
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