Seems to be a bus based system. We don’t know if it works or not, but you can try to connect the Opener with this guide as Generic Bus to the L1 & L2 lines of the intercom:
Seems to be a bus based system. We don’t know if it works or not, but you can try to connect the Opener with this guide as Generic Bus to the L1 & L2 lines of the intercom: