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 traditionally control, for example, the doorbell or the stairwell light.

If you want to turn on lights or control your existing doorbell simultaneously 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.

Up to six of these a/b switching modules can be used with one door station TFS-Dialog 300, and still, only a single two-wire line is required. Each button on 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.