Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
Table
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| Voice Quality Metrics |
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| MOS LQK | Score that is an objective estimate of the mean opinion | ||
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| score (MOS) for listening quality (LQK) that rates | ||
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| from 5 (excellent) to 1 (bad). This score is based on | ||
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| audible concealment events due to frame loss in the | ||
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| preceding | ||
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| more information, see the “Monitoring the Voice | ||
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| Quality of Calls” section on page | ||
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| Note The MOS LQK score can vary based on the | ||
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| type of codec that the Cisco Unified IP Phone | ||
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| uses. | ||
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| Avg MOS LQK | Average MOS LQK score observed for the entire voice | ||
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| stream. | ||
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| Min MOS LQK | Lowest MOS LQK score observed from start of the | ||
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| voice stream. | ||
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| Max MOS LQK | Baseline or highest MOS LQK score observed from | ||
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| start of the voice stream. | ||
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| These codecs provide the following maximum MOS | ||
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| LQK score under normal conditions with no frame | ||
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| loss: | ||
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| • G.711 gives 4.5 | ||
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| • G.729 A /AB gives 3.7 | ||
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| MOS LQK Version | Version of the Cisco proprietary algorithm used to | ||
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| calculate MOS LQK scores. | ||
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| Cmltve Conceal Ratio | Total number of concealment frames divided by total | ||
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| number of speech frames received from start of the | ||
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| voice stream. | ||
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| Interval Conceal Ratio | Ratio of concealment frames to speech frames in | ||
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| preceding | ||
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| voice activity detection (VAD), a longer interval might | ||
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| be required to accumulate 3 seconds of active speech. | ||
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| Cisco Unified IP Phone |
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