Cisco OL-18988-01 - Manual (Page 12)

8-12
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP and SIP)
OL-18988-01
Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
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 9-14 .
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 3.8
• G.728/iLBC gives 3.9
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 1 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.
Max Jitter Maximum value of instantaneous jitter, in milliseconds.
Sender Size RTP packet size, in milliseconds, for the transmitted stream.
Sender Reports
Received
1
Number of times RTCP Sender Reports have been received.
Sender Report Time
Received
1
Last time at which an RTCP Sender Report was received.
Rcvr Size RTP packet size, in milliseconds, for the received stream.
Rcvr Discarded RTP packets received from network but discarded from jitter buffers.
Rcvr Reports
Received
1
Number of times RTCP Receiver Reports have been received.
Rcvr Report Time
Received
1
Last time at which an RTCP Receiver Report was received.
1. When the RTP Control Protocol is disabled, no data generates for this field and it displays as 0.
Table 8-5 Streaming Statistics Area Items (continued)
Item Description