Global Door Phone Market 2016-2020
NEW YORK, Nov. 24, 2016 /PRNewswire/ — About Door Phone
Door phones are a necessity in a modern household. They are simple in structure and are relatively inexpensive. Door phones can be used for both voice communication as well as video communication and are used in apartments, single-family residences or residential buildings, and others. Door phones can also be used in factories as well as different communities to identify the visitors. Video door phone is constructed using power line communication channels. Door phones installed indoors are linked to video door phones outside via the power line.
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