Cisco 9971 - Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager

DescriptionItem
Number of RTP packets in the receiving voice stream that were discarded
(bad packets, too late, and so on).
The phone discards payload type 19 comfort noise packets that Cisco
Gateways generate, because they increment this counter.
Note
Rcvr Discarded
Missing RTP packets (lost in transit).Rcvr Lost Packets
Voice-Quality Metrics
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
eight-second interval of the voice stream. For more information, see Voice
Quality Monitoring, on page 330.
The MOS LQK score can vary based on the type of codec that the
Cisco Unified IP Phone uses.
Note
MOS LQK
Average MOS LQK score that was observed for the entire voice stream.Avg MOS LQK
Lowest MOS LQK score that was observed from the start of the voice stream.Min MOS LQK
Baseline or highest MOS LQK score that was 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 yields a score of 4.5.
•
G.729 A /AB yields a score of 3.7.
Max MOS LQK
Version of the Cisco proprietary algorithm that is used to calculate MOS
LQK scores.
MOS LQK Version
Total number of concealment frames divided by total number of speech
frames that were received from start of the voice stream.
Cumulative 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.
Interval Conceal Ratio
Highest interval concealment ratio from start of the voice stream.Max Conceal Ratio
Number of seconds that have concealment events (lost frames) from the start
of the voice stream (includes severely concealed seconds).
Conceal Secs
Number of seconds that have more than 5 percent concealment events (lost
frames) from the start of the voice stream.
Severely Conceal Secs
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Cisco Unified IP Phone Status