Anykam DT-DJ4A or similar

Hello!
I already sent requests via email but probably someone already tried connecting the Nuki-Opener to a DT-DJ4A Station.
The system is widely used in “cheap” new buildings with multiple flats.
Brand name can be Anykam, Avitec, Avitec24, V-Tec, V-Tek or similar.

It is using a simple 2-Wire non polarity bus so it may be compatible.
Anyone has experience with this?

Thanks!

Phone is wired internally with BUS lines (2 wires) and an additional connection for a door bell as shown below: