I actually have the same issue as bdesigner.

Running Domoticz 2020.2 (build 12395)

My Aeotec Siren 6 is paired and recognized. All the devices show up in Domoticz, but I cannot get it to work.

Clicking on one of the "Doorbell X Tones" switches does not seem to do anything. In OZWCP I also can ...