Hi Tassos,
Glad you like my setup – thanks alot
Sure thing! The door phone system in my building is manufactured by ASSO ABLOY (don't know the model – but I guess it's the newest industry technology).
When we moved into the apartment the property caretaker asked me what phone number I would like to use for the door phone. I told him my landline number, and then entered the number in the system. That's basically it.
So when someone rings the bell I get a phone call on my BeoCom 2's. I answer the call and press 5 and then the entrance door opens. Call ended.