The TFS-Dialog 212 from Auerswald is a modern door intercom system specially designed for a/b interfaces. It offers an elegant and functional solution for communication at the front door and fits seamlessly into any environment. Installation is straightforward as the system can simply be fixed to the wall or door frame with two screws. It is connected to an ICT system via a two-core cable, which enables simple integration into existing communication infrastructures. The door intercom system impresses with its excellent voice quality and offers numerous technical functions that increase convenience and user-friendliness. With illuminated buttons and a nameplate that works without an additional power supply, the TFS-Dialog 212 is both practical and attractive. It is ideal for apartment blocks or residential complexes with up to two residential units.