For TwInnensechskant video intercom systems with color image display. Brilliant color TFT display with 89 mm display diagonal, 320x240 (RGB) pixels and LED backlight. 20 selectable ring tones. Call volume adjustable in 8 steps. Call silencer with optical jerk signal. Optical call display. Night design. Light switching function. Opening button. Camera control in connection with porter camera module or camera switch. Call memory function. Ringing tone differentiation for door call, storey call and internal call. Integrated call connection relay (potential-free switching output). One special key freely assignable with visual feedback. Internal call selectable via menu. Automatic opening for door call and storey call. Control of display brightness, color and contrast. Display protected against scratching by a protective film. The system is standard with and with vision locked. Accept/end call button. Adjustable voice volume. Automatic call acceptance adjustable. Menu.