Cisco IP Phone 7961G-GE - Manual (Page 17)

8-17
Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.0
OL-11953-01
Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
Rcvr Report Time
Received
1
Last time at which an RTCP Receiver Report was received.
Voice Quality Metrics
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 .
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.
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.
1. When the RTP Control Protocol is disabled, no data generates for this field and thus displays as 0.
Table 8-5 Streaming Statistics Area Items (continued)
Item Description