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Cisco Unified IP Phone 7965G and 7945G Administration Guide for Cisco Unified Communications Manager 6.1(3)
OL-17755-01
Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
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Max MOS LQK Baseline or highest MOS LQK score 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 gives 4.5
• G.722 gives 4.5
• G.728/iLBC gives 3.9
• G.729 A/AB gives 3.8
MOS LQK Version Version of the Cisco proprietary algorithm used to calculate MOS LQK
scores.
Cumulative Conceal
Ratio
Total number of concealment frames divided by total number of speech
frames received from start of the voice stream.
Interval 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.
Max Conceal Ratio Highest interval concealment ratio from start of the voice stream.
Conceal Secs Number of seconds that have concealment events (lost frames) from the
start of the voice stream (includes severely concealed seconds).
Severely Conceal Secs Number of seconds that have more than 5 percent concealment events (lost
frames) from the start of the voice stream.
Latency 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.
Table 7-6 Call Statistics Items (continued)
Item Description
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