Cisco 7906G - Unified IP Phone VoIP Administration Manual page 195

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Table 7-6
Item
Min MOS
LQK
Max MOS
LQK
MOS LQK
Version
Cumulativ
e Conceal
Ratio
Interval
Conceal
Ratio
Max
Conceal
Ratio
Conceal
Secs
Severely
Conceal
Secs
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.1
OL-14585-01
Call Statistics Items (continued)
Description
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 3.8
•
G.728/iLBC gives 3.9
•
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.
Highest interval concealment ratio from start of the voice stream.
Number of seconds that have concealment events (lost frames)
from the start of the voice stream (includes severely concealed
seconds).
Number of seconds that have more than 5 percent concealment
events (lost frames) from the start of the voice stream.
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