Built-in loudspeaker Features: Built-in loudspeaker for installation in mailbox systems, intercom compartments, door side installations or front panels. Up to eight mechanical bell buttons can be connected to the existing screw terminals. Signal transmission and supply of the loudspeaker via the reverse polarity and short-circuit-proof 2-wire bus. Small design. Weatherproof loudspeaker. High-quality electret microphone. AC voltage query of the bell button connections to prevent oxidation on the button contacts. The connection terminals are protected against incorrect connection. Up to eight mechanical bell buttons can be connected. Color camera can be connected to the door station. Hands-free function (voice-controlled intercom with echo and background noise suppression). Speech volume can be adjusted. One-man commissioning through simple commissioning procedure. Acoustic acknowledgement signal when the call button is pressed. Notes: This component can be used to set up door communication systems with up to 140 audio participants (e.g. 1 x built-in loudspeaker, 11 x extension module for built-in loudspeaker, 136 x AP home station). When expanding to include a color camera, a video control unit is required.
