Cisco 7965G Administration Guide - Page 143

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone Status Menu Table 7-6 Call Statistics Items (continued) Item Max MOS LQK MOS LQK Version Cumulative Conceal Ratio Interval Conceal Ratio Max Conceal Ratio Conceal Secs Severely Conceal Secs Latency Description 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. Total number of concealment frames divided by total number of speech frames received from start of the voice stream. 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. Highest interval concealment ratio from start of the voice stream. Number of seconds that have concealment events (lost frames) from the start of the voice stream (includes severely concealed seconds). Number of seconds that have more than 5 percent concealment events (lost frames) from the start of the voice stream. 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. OL-14641-01 Cisco Unified IP Phone 7965G and 7945G Administration Guide for Cisco Unified Communications Manager 6.1 7-13