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Intercom "AA-1" was produced presumably since 1970.
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The device is intended for the organization of two-way communication between the dispatch center and subscribers or between subscribers.
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Since the device is connected to a common two-wire line, all subscribers hear the negotiations.
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The organization of a "round table" is possible.
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A special internal loudspeaker is built into the intercom.
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The "DEMSH" type microphone is attached to the magnet on the right side of the PU.
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The control panel is powered from a 220 V electrical network. Power consumption is 5 W.
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