Call and signalling mechanisms kit for accessible bathrooms and dressing rooms, as specified by the Technical Building Code (CTE - DB SUA - SUA3), and provide them with a call system that allows the user to know that his call has been received, with acoustic and light signalisation in a place of frequent passage. The kit is made up of a call mechanism with a pull cord and call-in-progress indicator LED, a 1.9 m red rope and two balls (according to ISO 21542), a push-button mechanism to cancel the call, an acoustic and light signalling mechanism, with the control electronics, frames for the three mechanisms and power supply.