Even if your telephone system does not TFE-interface, the TFS-Dialog 200 with its timeless design provides for highest comfort in the operation. It is over a two-wire cable directly to an a/b-port of your system and behaves like a telephone: a Bell button is pressed, the tursprechsystem a predetermined, internal or external number. From your phone, you can talk to the visitor - in excellent voice quality thanks to high-quality micro-electronics and him to open the door. And the white LED-background lighting gives a uniform and brightly lit name plate in darkness.The ultra flat casing merges with its flat design with almost all the local features. This makes a cumbersome flush-mounting unnecessary. To cover of any existing mounting boxes old systems is a top angled cover plate available which also acts as a weather-protection roof is used.This text is machine translated.