Cisco 8961 Administration Manual page 265
Unified communications manager 10.0 sip
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Model information, status, and statistics
REVIEW DRAFT - CISCO CONFIDENTIAL
Item
Rcvr Packets
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
Description
Number of RTP voice packets that were received since voice stream opened.
Note
Number of RTP voice packets that were transmitted since voice stream
opened.
Note
Estimated average RTP packet jitter (dynamic delay that a packet encounters
when going through the network), in milliseconds, that was observed since
the receiving voice stream opened.
Maximum jitter, in milliseconds, that was observed since the receiving voice
stream opened.
Number of RTP packets in the receiving voice stream that were 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
eight-second interval of the voice stream. For more information, see
Quality Monitoring, on page
Note
Average MOS LQK score that was observed for the entire voice stream.
Lowest MOS LQK score that was observed from the start of the voice stream.
Baseline or highest MOS LQK score that was 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 yields a score of 4.5.
• G.729 A /AB yields a score of 3.7.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
This number is not necessarily identical to the number of RTP voice
packets that were received since the call began because the call
might have been placed on hold.
This number is not necessarily identical to the number of RTP voice
packets that were transmitted since the call began because the call
might have been placed on hold.
The phone discards payload type 19 comfort noise packets that Cisco
Gateways generate, because they increment this counter.
293.
The MOS LQK score can vary based on the type of codec that the
Cisco Unified IP Phone uses.
Display Call Statistics Screen
Voice
(SIP)
241
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