Schneider Electric / Ritto Wiser door gateway binding?

I live in a building with a legacy TwinBus door entry system. Has anyone experience with the Schneider Electric / Ritto door Gateway system or a good starting point for interfacing it with openhab? Originally it seemed like the best way to interface with legacy door systems was via the Doorbird D301A which could talk to Twinbus.

Specifically keen on the voice component otherwise I’d build an esp8266 based open/close door controller.