Method and system for controlling a device
A technology of equipment and authorized equipment, which is applied in transmission systems, closed-circuit television systems, and components of television systems, etc., and can solve problems such as system limitations
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[0030] A door intercom according to an embodiment of the present invention can be configured to communicate using various types or combinations of communication systems. exist figure 2 In , some examples of communication systems that can be implemented by themselves or in combination are described. As in a traditional intercom system, the door intercom 106 is connected to a locking mechanism 108 that controls the entrance to the area of entry to prevent people from entering the area, such as through a door 110 that can be placed in the passageway, a gate, a rotary Fences, sliding doors and other movable barriers. The connection to the locking mechanism 108 may be a direct connection from the door intercom 106 to the locking mechanism 108, a design frequently used in conventional systems. However, the door intercom may alternatively be connected to an access controller (not shown), which is located in the protected area and communicates directly with the locking mechanism ...
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