2 doors opening (not at the same time)

Hello,First of all, in my building we have 2 differents doors, they are independent, so you can enter to the building from one or from the other.My usual intercom has only 1 button, and opens the door where the person has pushed the ring.I want to remark that I cant know from which one the people is calling. I dont need it as I only have 1 button. Also, the button dont open both doors at the same time. It is only able to open “calling door”.Now, I am trying to configure the Ring Intercom but the device is only working with one of the two doors. I am not able to know why is working with one door but no with the other.It is a problem of the device compatibilty? It is a problem of my intercom model (Tegui 374294)? It is a problem of the electric installation?I am attaching a photo of the intercom.Any help with this would be very helpful.