The stainless steel door intercom system from Auerswald sets new design accents at your door. Large buttons with integrated, energy-saving LED lighting guide visitors safely to their desired destination. An existing Auerswald installation can be easily upgraded to the TFS-Dialog 300, bringing it up to date with excellent sound quality. The door intercom system is simply screwed onto the existing flush-mounted box. For new installations, a suitable flush-mounted box is included.

The system is ideal for telephone systems without a separate door intercom interface, as it connects directly to a free analog extension port of the system. By pressing a doorbell button, the door intercom system behaves like an extension phone and dials a previously programmed number – another extension, a group, or even an external destination. Simultaneously with this "door call," a switching operation can also be triggered, which can control, for example, the doorbell or the stairwell light in a classic manner.

If you want to switch on lights or control your existing doorbell by pressing a (doorbell) button, you will need additional switching contacts. Auerswald offers an exclusive solution for the TFS-Dialog 300 with a/b switching modules, which can be easily connected at any point on the signal line between the door intercom system and the telephone system, triggering the switching operation when a button is pressed.

Six of these a/b switching modules can be used with a TFS-Dialog 300 door station, and only a single two-wire line is required. Each button of the door station can control one or more switching modules with freely selectable assignments. The modules fit easily into existing flush-mounted boxes, for example.