Cisco 7906G

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Call Statistics Screen
7-20
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
OL-11515-01
Avg Jitter 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.
Rcvr Codec Type of audio encoding used for the received stream.
Rcvr Packets 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.
MOS LQK 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
“Monitoring the Voice Quality
of Calls” section on page 9-21.
Note The MOS LQK score can vary based on the type of codec that the
Cisco
Unified IP Phone uses.
Avg MOS LQK Average MOS LQK score observed for the entire voice stream.
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.
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).
Table 7-6 Call Statistics (continued)
Item Description