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How Do Video Surveillance Systems Work?

Video surveillance systems have been used to enhance security across a wide range of operations. They typically consist of a system of cameras, monitors/display units, and recorders which work in tandem to capture footage of an area. The systems can be applied either inside or outside and can be designed to only record in response to movement, or set to record during specific times of the day. Aside from that, the cameras may be conspicuous and out in the open to deter crime, or they may be more hidden to record evidence with fewer chances of being tampered with. Overall, there are a lot of different system types available, but they all rely on the same core set of working mechanics, all of which will be discussed here in this blog post.

How Are Video Surveillance Systems Monitored?

There are several ways that a surveillance system may be monitored. The most traditional method is having a security guard or team who is in charge of viewing the live footage on monitors/display units that are connected to the recorder. However, with the vast majority of security cameras being digital internet protocol cameras in today’s systems, the video feed is now available via a network. So, while there may still be an official display unit, it can also be accessed via computers and mobile devices. Additionally, some contemporary systems have the ability to wait until they detect movement and then send a mobile alert to authorized personnel who can then check the live feed.

How Do Video Surveillance Systems Record?

Usually when a closed-circuit television (CCTV) system picks up movement, it will begin recording footage so it can be reviewed later. If necessary, some systems can be chosen that record every second of footage, but there will be a lot of storage required. Otherwise, for systems using analog cameras, the footage will be sent from the camera to a DVR via a coaxial cable. The DVR records the footage from the analog cameras in digital format. Once the DVR’s hard disk storage is full, older images will be replaced by newer ones, starting with the oldest images first. Finally, for video surveillance systems that use IP cameras, a network video recorder (NVR) is used. The camera and NVR are connected by way of a router or network switch. Similar to a DVR, the footage is encrypted and stored on a hard disk where it can be viewed through a connected display unit, web browser, or mobile app.

New Technologies Available for Video Surveillance Systems

Video surveillance systems have advanced over time with improving technology. Alongside other aspects, video surveillance can now offer facial recognition, smart cameras, thermal cameras, night vision, high definition full color, and a variety of smart technologies that allow cameras to send immediate notifications based on certain types of activities. For example, PTX cameras have smart tracking that allows them to identify and follow people or vehicles until they are out of range. Consequently, there are a lot of options available depending on what sort of features a system requires.


Video surveillance systems are used in a number of security applications, including on commercial aircraft. When you are in the market for high quality video surveillance system parts for your business, you can rely on Procurement Domain for our expansive catalog of available parts. Hosting a vast inventory of aircraft components from a widespread network of trusted manufacturers from across the globe, we are well-equipped to offer premium service as your sourcing partner. Get started with the fulfillment process by browsing our online inventory and submitting a Request for Quote (RFQ) form with details about your operational needs. More than that, our dedicated team of experts are available 24/7x365 to answer customer inquiries and form submissions, so you can expect a response within just 15 minutes of sending a completed RFQ!


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