Fermax Citymax Extra ADS 2456

Hello all! We have the opener and the bridge, and we’re trying to connect it to the FERMAX on the description, which doesn’t show in the list of compatible intercoms.

Has anyone managed to connect it? We tried it following the 3311 instructions (saw it somewhere) with no luck.

Side note, our building has 2 doors to open with the same button: the outer gate and the building itself.

Any ideas?

Thanks in advance!