• Acoustical and optical indication of door and internal calls
• Hands-free operation with high audio quality
• Door release function
• Switching light
• Hands-free operation, manual controlled simplex operation possible
• Internal call with automatically hands-free operation
• Door release button
• One push-button switches lighting (basic settings)
  alternative assignment: control function, internal call, automatic door release, call diversion
• Push-button for taking call or change over between speaking/listening if simplex communication is activated
• Selection of 13 ring tones
• Ring tone differentiation between main door, floor door and internal call
• Sub door call: 4 bell buttons of the outdoor station can be assigned to 4 different ring tones of the indoor station
• Ring tone differentiation of 2 outdoor stations
• Ring tone volume manually adjustable
• High-quality sound and great speaker dynamics
• Ring tone mute with optical display
• Parallel call can be activated
• Integrated connection for floor door bell
• Optical indication of door calls
• Optical status indication if system is occupied (existing communication)
• 3-wire technique
• 2-wire technique with up to 16 indoor stations
• Blue orientation LED (3-wire technique required)
• Audio privacy function
• Automatic call cut-off
• Electret capacitor microphone
• Audio and video indoor stations can be combined in the same installation

Recommended installation: use an outlet box for wall luminaires