Cisco 7931G - Unified IP Phone VoIP Administration Manual page 184

Status Menu
Table 7-5
Item
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cumulative Conceal
Ratio
Interval Conceal Ratio
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.0
7-18
Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Call Statistics (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
the Voice Quality of Calls" section on page
Note
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:
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.
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.
The MOS LQK score can vary based on the
type of codec that the
Cisco Unified IP Phone uses.
G.711 gives 4.5
•
G.729 A /AB gives 3.8
•
G.728/iLBC gives 3.9
•
"Monitoring
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