Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
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7-18
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
RxDisc Number of RTP packets in the receiving voice stream
that have been discarded (bad packets, too late, and
so on).
Note The phone will discard payload type 19
comfort noise packets that are generated by
Cisco Gateways, which will increment this
counter.
RxLost Missing RTP packets (lost in transit).
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 9-25.
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
Table 7-6 Call Statistics Items (continued)
Item Description
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