Cisco Unified IP Phone 8941 - Page 163

DescriptionItem
Number of RTP voice packets transmitted since voice stream was opened.
This number is not necessarily identical to the number of RTP voice
packets transmitted since the call began because the call might have been
placed on hold.
Note
Sender Packets
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
Number of RTP packets in the receiving voice stream that have been discarded
(bad packets, too late, and so on).
The phone will discard payload type 19 comfort noise packets that are
generated by Cisco Gateways, which will increment this counter.
Note
Rcvr Discarded
Missing RTP packets (lost in transit).Rcvr Lost Packets
Voice Quality Metrics
Total number of concealment frames divided by total number of speech frames
received from start of the voice stream.
Cumulative Conceal
Ratio
Ratio of concealment frames to speech frames in preceding 3 second interval of
active speech. If using voice activity detection (VAD), a longer interval might be
required to accumulate 3 seconds of active speech.
Interval Conceal Ratio
Highest interval concealment ratio from start of the voice stream.Max Conceal Ratio
Number of seconds that have concealment events (lost frames) from the start of
the voice stream (includes severely concealed seconds).
Conceal Secs
Number of seconds that have more than 5 percent concealment events (lost frames)
from the start of the voice stream.
Severely Conceal Secs
Estimate of the network latency, expressed in milliseconds. Represents a running
average of the round-trip delay, measured when RTCP receiver report blocks are
received.
Latency
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 IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCP
and SIP)
149
Cisco Unified IP Phone Status