Control the door release function of an apartment intercom
The door strike is the bit on the frame that the lock latches into.

https://en.wikipedia.org/wiki/Electric_strike

What I get from this badly worded instruction sheet is that if you want an electric strike, so you can operate the door release remotely you route the power supply to the strike (which must be within the specified parameters) via these two pins. Internally there is a normally open contact activated by the "option" button which will complete your circuit and activate your strike (that is it will release the door).

So you will need to supply an electric strike (if not fitted) and its up to 24V supply, and all the intercom does is activate it when you press "option". So if you don't want to have the "press option" feature, just ignore that and create your own entirely independent circuit with a strike, power supply and switch.