K-factor (Cisco)

In Cisco Voice over IP deployments, the K-Factor is a Cisco proprietary method of reporting endpoint mean opinion scores.^[1] K-factor records contain the following metrics:

K-factor metrics

Field	Display	Description
CCR	Cum Conceal Ratio	Cumulative Conceal Ratio represents the cumulative ratio of concealment time over speech time that is observed after starting a call
ICR	Interval Conceal Ratio	Interval Conceal Ratio represents an interval-based average concealment rate that is the ratio of concealment time over speech time for the last 3 seconds of active speech
ICRmx	Max Conceal Ratio	Interval Conceal Ratio Max represents the maximum concealment ratio that is observed during the call
CS	Conceal Secs	Conceal Secs represents the time during which some concealment is observed during a call
SCS	Severely Conceal Secs	Severely Conceal Secs represents the time during which a significant amount of concealment is observed
MLQK	MOS LQK	MOS Listening Quality K-factor provides an estimate of the MOS score of the last 8 seconds of speech on the reception signal path
MLQKmn	Min MOS LQK	MOS Listening Quality K-factor Min represents the minimum score that is observed since the beginning of a call and represents the worst sounding 8-second interval
MLQKmx	Max MOS LQK	MOS Listening Quality K-factor Max represents the maximum score that is observed since the beginning of a call and represents the best sounding 8-second interval
MLQKav	Avg MOS LQK	MOS Listening Quality K-factor Avg represents the running average of scores that are observed since the beginning of a call

References

1. "Cisco Call Management Records K-Factor Data". Cisco Systems. Retrieved 23 August 2013.