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Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 7.0
OL-15483-01
Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
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.
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 9-15
.
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.722 gives 4.5
•
G.728/iLBC gives 3.9
•
G.729 A/AB gives 3.8
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