CCTV (Closed-circuit television)?

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“CCTV” redirects here. For the Chinese channel, see China Central Television. For other uses, see CCTV (disambiguation). Closed-Circuit Television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on … Continued

Lan Network System

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Different Types of Networks There are many ways in which different networks can be classified, such as their size, capabilities and the geographical distance they cover. A network is simply a group of two or more computer systems linked together … Continued

Switchboard PABX

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Tổng đài nội bộ PABX Thông tin liên lạc ngày nay đóng vai trò rất quan trọng trong cuộc sống. Để đáp ứng yêu cầu liên lạc trong nội bộ, cách thông thường trước đây là đăng ký các thuê bao … Continued

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