Chapter7 Viewing Model Information, Status, and Statistics on the Cisco Unified I P Phone
Call Statistics Screen
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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
MOS LQK Version Version of the Cisco proprietary algorithm used to calculate MOS LQK
scores.
Cumulative Conceal
Ratio
Total number of concealment frames divided by total number of speech
frames received from start of the voice stream.
Interval 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.
Max Conceal Ratio Highest interval concealment ratio from start of the voice stream.
Conceal Secs Number of seconds that have concealment events (lost frames) from the start
of the voice stream (includes severely concealed seconds).
Severely Conceal Secs Number of seconds that have more than 5 percent concealment events (lost
frames) from the start of the voice stream.
Latency1Estimate of the network latency, expressed in milliseconds. Represents a
running average of the round-trip delay, measured when RTCP receiver
report blocks are received.
Max Jitter Maximum value of instantaneous jitter, in milliseconds.
Sender Size RTP packet size, in milliseconds, for the transmitted stream.
Rcvr Size RTP packet size, in milliseconds, for the received stream.
Rcvr Discarded RTP packets received from network but discarded from jitter buffers.
1. When the RTP Control Protocol is disabled, no data generates for this field and thus displays as 0.
Table7-5 Call Statistics (continued)
Item Description