Is it possible to replace my current internal station with the Classe 100X: - Single or two-family house: replacement without modifying the video door entry system wiring - Residential building: depending on the characteristics of your installation, it may be sufficient to replace the internal station or it may be necessary to add a dedicated power supply cod.346020 For the sizing of multi-family installations, refer to the General installation rules of the Technical Guide for 2-wire systems