Cisco 7911G - IP Phone VoIP Administration Manual page 198

Status Menu
Table 7-6
Item
RxDisc
RxLost
Voice Quality Metrics
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
7-18
Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone
Call Statistics Items (continued)
Description
Number of RTP packets in the receiving voice stream
that have been discarded (bad packets, too late, and
so on).
Note
Missing RTP packets (lost in transit).
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
the Voice Quality of Calls" section on page
Note
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 provide the following maximum MOS
LQK score under normal conditions with no frame
loss:
The phone will discard payload type 19
comfort noise packets that are generated by
Cisco Gateways, which will increment this
counter.
The MOS LQK score can vary based on the
type of codec that the Cisco Unified IP
Phone uses.
G.711 gives 4.5
•
G.729 A /AB gives 3.8
•
G.728/iLBC gives 3.9
•
"Monitoring
9-25.
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