Cisco 7941G Administration Manual page 206

Call Statistics Screen
Item
Sender Packets
Avg Jitter
Max Jitter
Rcvr Discarded
Rcvr Lost Packets
Voice Quality Metrics
MOS LQK
Avg MOS LQK
Min MOS LQK
Max MOS LQK
MOS LQK Version
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco
Unified Communications Manager 9.0 (SCCP and SIP)
186
Description
Number of RTP voice packets transmitted since voice stream was
opened.
This number is not necessarily identical to the number of RTP
Note
voice packets transmitted since the call began because the call
might have been placed on hold.
Estimated average RTP packet jitter (the dynamic delay that a packet
encounters when going through the network) observed since the
receiving voice stream was opened.
Maximum jitter observed since the receiving voice stream was opened.
Number of RTP packets in the receiving voice stream that have been
discarded.
The phone discards payload type 19 comfort noise packets that
Note
are generated by Cisco Gateways, which increment this counter.
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 Voice Quality Monitoring, on page
The MOS LQK score can vary based on the type of codec that
Note
the 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 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
Version of the Cisco proprietary algorithm used to calculate MOS LQK
scores.
Model Information, Status, and Statistics
232.