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Door Intercommunication Audio Systems

Аудиодомофоны
>Intercom devicewhich, as a rule, establishnear the entrance to the room. You get to control various devices of access control, such as electromechanical or electro-magnetic locks, door drive, barriers. When installing the systemintercom with the lock in the Office Office Access limited to any unauthorized persons. Whenintercom is establishedat home, he works as a door bell and in addition to that you can carry on a conversation with a man who is in front of the entrance door or gate and see it on the monitor.Intercoms-can be divided into 2 categories: black-and-white and color. Audioon-door speakerphones are a typedoor intercommunication system the most simple,but quite effectivesecurity devicesapartment, House, porchOffice or holiday home. Audio door phone isa bilateral negotiatingthe device consists of a ringinga panel that is mounted,usually on the outside of thedoor and top tubeinside the building. When you click theIntercom button on the handset emits a ringing melodic warble twice in a row. That is, when using the device There is no need in the usual traditional èlektrozvonke. INhomfone in all audiotrubkah installed inside houses, there are buttons to open the series.

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