Opener configuration golmar t562

Hello guys,
I would like to setup an opener with my golmar t562 intercom.
There is only 2 wires so I don’t know if I can manage to do it.
I ask to the electrician of the building to get 4 wires but he tell me it is impossible.

What could be the solution ?

  • a specific configuration with tihs intercom and 2 wires
  • change the intercom

Thank you very much for your help