Specifications

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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.5
OL-23092-01
Chapter 8 Monitoring the Cisco Unified IP Phone Remotely
Streaming Statistics
Rcvr Packets 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.
Rcvr Octets 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.
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 9-17.
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.
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).
Table 8-5 Streaming Statistics Area Items (continued)
Item Description