Cisco Unified Ip Phone 8961, 9951, And 9971 Administration Guide For Cisco Unified Communications Manager - Cisco 9971 Administration Manual

Item
Rcvr Discarded
Rcvr Lost Packets
Voice-Quality Metrics
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cumulative Conceal Ratio
Interval Conceal Ratio
Max Conceal Ratio
Conceal Secs
Severely Conceal Secs

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0

Description
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
Note
Gateways generate, because they increment this counter.
Missing RTP packets (lost in transit).
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
Quality Monitoring, on page
The MOS LQK score can vary based on the type of codec that the
Note
Cisco Unified IP Phone uses.
Average MOS LQK score that was observed for the entire voice stream.
Lowest MOS LQK score that was observed from the start of the voice stream.
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.
Version of the Cisco proprietary algorithm that is used to calculate MOS
LQK scores.
Total number of concealment frames divided by total number of speech
frames that were 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 Status
330.
Voice
279