Electric Door Strike

I live in a brownstone that has a front double door (3′ x 10′) with glass windows. There is an intercom system, but no door buzzer (i.e., electric door strike). We were told that there is no system to accomodate a buzzer (electric door strike) for the type of doors we have.

First, does anyone know if a door buzzer (electric strike door) can be installed on double doors or not?

If so, is there an alternative system that can be installed?

And can anyone recommend a locksmith or handyman who can install the door buzzer in Brooklyn?

Thanks

By sniec |