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Built-in loudspeaker Features: Built-in loudspeaker for mounting in letterbox systems, intercom compartments, door side installations or front panels. Up to eight mechanical bell pushes can be connected to the existing screw terminals. Signal transmission and supply of the loudspeaker via the 2-wire bus which is protected against polarity reversal and short-circuit proof. Small design. Weatherproof loudspeaker. High-quality electret microphone. AC voltage interrogation of the bell button connections to prevent oxidation at the button contacts. Protection of the connection terminals against incorrect connection. Up to eight mechanical bell buttons can be connected. Colour camera for door station can be connected. Hands-free function (voice-controlled intercom with echo and background noise suppression). Speech volume adjustable. One-man commissioning through simple commissioning procedure. Acknowledgement tone when call button is pressed. Remarks : With this component it is possible to set up door communication systems with up to 140 audio users (e.g. 1 x built-in loudspeaker, 11 x extension module for built-in loudspeaker, 136 x surface-mounted home station). A video control unit is required for the extension with a colour camera. Protection class IP44 only in conjunction with a suitable front or in the installed state.
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