Cisco 7975G Software Manual page 233

Remote Monitoring
Item
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cmltve Conceal Ratio
Interval Conceal Ratio
Max Conceal Ratio
Conceal Secs
Severely Conceal Secs
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
Quality Monitoring, 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:
For Cisco Unified IP Phone 7975G, 7965G, and 7945G:
• G.711 gives 4.5.
• G.722 gives 4.5.
• G.728/iLBC gives 3.9.
• G.729 A/AB gives 3.8.
For Cisco Unified IP Phone 7971G-GE and 7970G:
• 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.
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.
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
237.
The MOS LQK score can vary based on the type of codec that
the Cisco Unified IP Phone uses.
Communications Manager 9.0 (SCCP and SIP)
Streaming Statistics
Voice
213