Abb/Busch Jaeger Welcome Homeassistant Integration

Hi all,

We have a KNX Bus system available in our house and the ABB/Busch Jaeger Welcome System. Additional a Homeassistant running on a Raspi4.

I am wondering if anybody has integrated the 2-Wire Bus of the ABB/B+J Welcome into KNX or Homeassistant. Does anybody know what kind of Bus system they are using? Is it accessible somehow to read data from it?

Any hints are much appreciated.