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Streaming Statistics
Table 7-5
Streaming Statistics Area Items (continued)
Item
Rcvr Lost Packets
Avg Jitter
Rcvr Codec
1
Rcvr Reports Sent
1
Rcvr Report Time Sent
Rcvr Packets
Rcvr Octets
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cumulative Conceal Ratio
Interval Conceal Ratio
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
7-12
Description
Total number of RTP data packets that have been lost since starting receiving data on this
connection. Defined as the number of expected packets less the number of packets actually
received, where the number of received packets includes any that are late or duplicate. The
value displays as 0 if the connection was set to send-only mode.
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.
Type of audio encoding used for the received stream.
Number of times the RTCP Receiver Reports have been sent.
Internal time stamp indication when a RTCP Receiver Report was sent.
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.
Total number of payload octets received in RTP data packets by the device since starting
reception on the 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.
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
The MOS LQK score can vary based on the type of codec that the
Note
Cisco Unified IP Phone uses.
Average MOS LQK score observed for the entire voice stream.
Lowest MOS LQK score observed from start of the voice stream.
Baseline or highest MOS LQK score observed from start of the voice stream.
These codecs on the Cisco Unified IP Phones 7962G and 7942G 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
•
These codecs on the Cisco Unified IP Phones 7961G/G-GE and 7941G/41G-GE 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
•
Version of the Cisco proprietary algorithm used to calculate MOS LQK scores.
Total number of concealment frames divided by total number of speech frames received
from start of the voice stream.
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.
Chapter 7
Monitoring the Cisco Unified IP Phones Remotely
9-15.
OL-23091-01
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