Cisco Ip Phone 8800 Series Administration Guide For Cisco Unified Communications Manager - Cisco 8800 Series Administration Manual

Item
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
Latency
(see note)
Max jitter
Sender size

Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager

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 that are to frame loss in the preceding eight-second
interval of the voice stream. For more information, see
Monitoring, on page 310.
The MOS LQK score can vary due to the codec type that the Cisco
Note
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 4.5.
• G.729 A /AB yields 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 the start of the voice stream.
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.
Highest interval concealment ratio from the 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 five percent concealment events (lost
frames) from the start of the voice stream.
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.
Maximum value of instantaneous jitter, in milliseconds.
RTP packet size, in milliseconds, for the transmitted stream.
Cisco IP Phone Web Page
Voice Quality
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