Cisco 7906G Administration Manual page 186

Call Statistics Screen
Table 7-6 Call Statistics (continued)
Item
Avg Jitter
Rcvr Codec
Rcvr Packets
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version Version of the Cisco proprietary algorithm used to calculate MOS LQK scores.
Cumulative
Conceal Ratio
Interval Conceal
Ratio
Max Conceal Ratio Highest interval concealment ratio from start of the voice stream.
Conceal Secs
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
7-20
Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Description
Estimate of mean deviation of the RTP data packet inter-arrival time, measured
in milliseconds. The value displays as 0 if the connection was set to send-only
mode.
Type of audio encoding used for the received stream.
Total number of RTP data packets received by the phone since starting receiving
data on this connection. Includes packets received from different sources if this
is a multicast call. The value displays as 0 if the connection was set to send-only
mode.
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 8-second interval
of the voice stream. For more information, see the
of Calls" section 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 observed for the entire voice stream.
Lowest MOS LQK score observed from start of the voice stream.
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
•
Total number of concealment frames divided by total number of speech frames
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.
Number of seconds that have concealment events (lost frames) from the start of
the voice stream (includes severely concealed seconds).
9-21.
"Monitoring the Voice Quality
OL-11515-01