Cisco Systems 8861 User Manual
Description
Item
Total number of concealment frames divided by total number of speech frames
that were received from the start of the voice stream.
that were received from the start of the voice stream.
Cumulative Conceal Ratio
Ratio of concealment frames to speech frames in the preceding 3-second interval
of active speech. If voice activity detection (VAD) is in use, a longer interval
might be required to accumulate three seconds of active speech.
of active speech. If voice activity detection (VAD) is in use, a longer interval
might be required to accumulate three seconds of active speech.
Interval Conceal Ratio
Highest interval concealment ratio from the start of the voice stream.
Max Conceal Ratio
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 that are to frame loss in the preceding eight-second
interval of the voice stream. For more information, see
quality (LQK) that rates from 5 (excellent) to 1 (bad). This score is based on
audible concealment events that are to frame loss in the preceding eight-second
interval of the voice stream. For more information, see
Monitoring, on page 266
.
The MOS LQK score can vary due to the codec type that the Cisco
Unified IP Phone uses.
Unified IP Phone uses.
Note
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.
stream.
These codecs provide the following maximum MOS LQK score under normal
conditions with no frame loss:
conditions with no frame loss:
• G.711 yields 4.5.
• G.729 A /AB yields 3.7.
Max MOS LQK
Version of the Cisco proprietary algorithm that is used to calculate MOS LQK
scores.
scores.
MOS LQK Version
Number of seconds that have concealment events (lost frames) from the start
of the voice stream (includes severely concealed seconds).
of the voice stream (includes severely concealed seconds).
Conceal Secs
Number of seconds that have more than five percent concealment events (lost
frames) from the start of the voice stream.
frames) from the start of the voice stream.
Severely Conceal Secs
Estimate of the network latency, expressed in milliseconds. Represents a running
average of the round-trip delay, measured when RTCP receiver report blocks
are received.
average of the round-trip delay, measured when RTCP receiver report blocks
are received.
Latency
(see note)
Maximum value of instantaneous jitter, in milliseconds.
Max Jitter
RTP packet size, in milliseconds, for the transmitted stream.
Sender Size
Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager 10.5
241
Cisco IP Phone Web Page