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2. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Door and window sensors are also implemented in most home security systems. One part of the system is installed on the door or window itself while the other part is installed on the frame of the door or window. The two part system connects securely when a door or window is closed, creating a security circuit. [5]

3. HDcctv - Wikipedia

   en.wikipedia.org/wiki/HDcctv

   [1] [2] [3] HDcctv uses the SMPTE HD-SDI protocol and can transmit 720p or 1080p video over at least 100 m of RG59 cable. The HDcctv Alliance is a non-profit, global consortium that develops and promotes the HDcctv standard. Advantages over IP video surveillance are claimed to include low latency and zero configuration.

4. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   An intercom and/or video camera are often used to allow the guard to control the trap from a remote location. In an automatic mantrap, identification may be required for each door, sometimes even different measures for each door. For example, a key may open the first door, but a personal identification number entered on a number pad opens the ...

5. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera. The main difference between 2.4 and 5 GHz frequencies is range.

6. Closed-circuit television - Wikipedia

   en.wikipedia.org/wiki/Closed-circuit_television

   About 65% of CCTV cameras in the world are installed in Asia. [76] In Asia, different human activities attracted the use of surveillance camera systems and services, including but not limited to business and related industries, [77] transportation, [78] sports, [79] and care for the environment. [80]

7. Google Nest - Wikipedia

   en.wikipedia.org/wiki/Google_Nest

   Nest Secure was a home security system announced in September 2017. [77] The system consisted of Nest Guard (an alarm, keypad, and motion sensor with embedded microphone), Nest Detect (a door/window and motion sensor), and Nest Tag (a key chain fob). [78] The product was released in November 2017.