The problem here is that we have a few issues to solve. The first is understanding that the really old ringers required a signal from the telephone company so let's find out what that signal was. (I'm going to use duckduckgo instead of google here.)
AHA, we find out it matters what COUNTRY this Telephone is from. You spelled it as "Telefone" so for this discussion you'll have to use your country's specs. For the USA I read at http://www.epanorama.net/circuits/telephone_ringer.html that it's "20Hz minimum ring voltage supplied is 40Vrms (delivered into a 5 REN load)."
Now that we know this we have to find a way to create such a signal. Again, we duckduckgo.com as above to find this link. http://www.techlib.com/electronics/telephone.html
The second schematic is what we need. Now try connecting your wires from your current bell to that ring inhibit and see if that works for you.
I have an old Telefone very loud Bell & want to connect it to the gate small bell (which i cannot hear).
I wish I could attach a foto here, but it has 2 2" bells, silvery cylinder el. component 3" long, 2 electromagnets 2" long & 10 screw connectors for wires.
It used to work untill a disconnected it & now use cordless telefone.
Does anybody have a cristall ball to see it & advise if I can use it as a gate bell? .....thanx ......nick