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The Door Bell History

Video door entry system, which is also known as a video intercom or doorphone. It is a stand-alone system used to manage calls made at the entrance to a building which include residential complex, detached family home, workplace, etc.. Video door phone works with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that video intercom enables the person indoors to identify the visitor and, only if they wish, engage in conversation or open the door to allow access to the person calling.

Video Door Entry Contents

1 Equipments: indoor monitor, outdoor camera
2 Automatic operation
3 Video door intercom with access control
4 Extra functions of video door phone
5 Common equipment types
6 Video intercom adaptive equipment