How is the KNX busload calculated?

Since version 3.0, there is a diagram under Monitoring → System State, showing the KNX busload of the last 2 minutes .

The calculation of the busload assumes that twisted pair is used for the KNX bus and the maximum telegrame rate is 48 telegrams per second.

For example, if 24 telegrams arrive within a second, the KNX busload will be 50%.