Modular Door Intercom System

摘要

The system has at least one door (2) and dwelling station (4) connected or for connection via a two-wire line. At least some of the door and/or dwelling stations are modular with a main module (20) and at least one functional module (22). The main module is similar to an electrical installation device with a socket type insert for a standard box and the functional module(s) can be electrically and/or mechanically connected to the main module.