Procedure
Step 1
Press Applications.
Step 2
Select Admin Settings.
Step 3
Select Status.
Step 4
Select Call Statistics. Call Statistics Fields, on page 61 describes the fields in the screen.
Step 5
To exit the Call Statistics screen, press Back .
Call Statistics Fields
The following table contains the fields in the Call Statistics screen.
Table 12: Call Statistics Items for the Cisco Unified SIP Phone 3905
DescriptionItem
Type of voice stream received (RTP streaming audio from codec): G.729, G.711 u-law,
G.711 A-law.
Rcvr Codec
Type of voice stream transmitted (RTP streaming audio from codec): G.729, G.711
u-law, G.711 A-law.
Sender Codec
Estimated average RTP packet jitter (dynamic delay that a packet encounters when
going through the network) observed since the receiving voice stream was opened.
Avg Jitter
Maximum jitter observed since the receiving voice stream was opened.Max Jitter
Voice Quality Metrics
Objective estimate of the Mean Opinion Score (MOS) for Listening Quality (LQK)
that ranks audio quality from 5 (excellent) to 1 (bad). This score is based on
audible-concealment events due to a frame loss in the preceding 8 seconds of the voice
stream.
The MOS LQK score can vary based on the type of codec that the
Cisco Unified IP Phone uses.
Note
MOS LQK
Average MOS LQK score for the entire voice stream.Avg MOS LQK
Lowest MOS LQK score from the start of the voice stream.Min MOS LQK
Cisco Unified SIP Phone 3905 Administration Guide for Cisco Unified Communications Manager 8.6 (SIP)
61
Model Information, Status, and Statistics
Access Call Statistics Screen
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