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Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Status Menu
7-18
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.1
OL-14587-01
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 9-21.
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 3.8
G.728/iLBC gives 3.9
MOS LQK Version Version of the Cisco proprietary algorithm used to
calculate MOS LQK scores.
Cumulative Conceal
Ratio
Total number of concealment frames divided by total
number of speech frames received from start of the
voice stream.
Interval Conceal Ratio 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.
Table 7-5 Call Statistics (continued)
Item Description
188


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