K-factor (Cisco)
In Cisco Voice over IP deployments, the K-Factor is a Cisco proprietary method of reporting endpoint mean opinion scores. K-factor records contain the following 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 |