Cisco UNIFIED OL-23092-01 User Manual
Page 14
8-14
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6
OL-23092-01
Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
Severely Conceal Secs
Number of seconds that have more than 5 percent concealment events
(lost frames) from the start of the voice stream.
Latency
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
Number of times RTCP Sender Reports have been received.
Sender Report Time
Received
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
Number of times RTCP Receiver Reports have been received.
Rcvr Report Time Received
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
Monitoring the Voice Quality of Calls, page 9-18
.
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:
For Cisco Unified IP Phone 7975G, 7965G, and 7945G:
•
G.711 gives 4.5
•
G.722 gives 4.5
•
G.728/iLBC gives 3.9
•
G.729 A/AB gives 3.8
For Cisco Unified IP Phone 7971G-GE and 7970G:
•
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.
Table 8-5
Streaming Statistics Area Items (continued)
Item
Description