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Cisco Unified IP Phone 7940G/7960G Administration Guide for Cisco Unified CallManager 4.2(3)
OL-8555-02
Chapter 6 Viewing Model Information, Status, Statistics, and Security Information on the Cisco Unified IP Phone
Call Statistics Screen
Min MOS LQK Lowest MOS LQK score observed from start of the
voice stream.
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.729 A /AB gives 3.7
MOS LQK Version Version of the Cisco proprietary algorithm used to
calculate MOS LQK scores.
Cmltve 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.
Table 6-6 Call Statistics (continued)
Item Description