If you are concerned about the security of your home, but are perplexed with the high costs of the Closed Circuit TV, CCTV security camera systems, and high subscription costs of the manned security services, then you have come to the right place. In this short article you will see a simple analogy between a computer web camera and the CCTV security system. This analogy may help you better understand what you are purchasing before you buy a CCTV surveillance system, and what you should look for. It should make your purchasing decisions easier. There are four major components to the CCTV System, Cameras, Wires, Central unit with storage and the Display. Let's look at the individual choices.
CCTV Cameras
CCTV cameras can be compared to a simple web camera. What is the difference? Well, the CCTV cameras must be designed to be able to present quite a high resolution image. Secondly, they need to return image in any conditions, such as in the dark. That especially applies for the outdoor cameras. So they need special infrared light diodes to "illuminate" the scene, as well as they need the camera to be sensitive to the reflected infrared waves at night. Another difference is that sometimes, a CCTV camera must be made vandal proof.
Wires
While usually a web camera can be connected to a computer via a USB cable, the normal USB cables will only stretch as far as 5 yard. Not sufficient for most CCTV surveillance purposes. So today's cables for security cameras are either coaxial cables with the range of 100 yard or more, or they are IP, internet protocol, cables with the range of about 100 feet. Another option is to let go of the cables completely and replace them with a wireless signal, of the standard wireless-G and/or wireless-N variety.
Central unit
In case of the web camera this would be a computer, or a laptop. In case of the CCTV system, you could drive all signals into a computer, but usually you would rather use a dedicated DVR, digital video recorder for such purposes. A security DVR is a computer in itself, and handles storing, displaying, backing up, and sometimes streaming to the internet of the video signal. This is all accomplished with the special DVR unit software that comes preinstalled in a unit. The DVR unit usually has one or more hard disks attached with high capacity to store several weeks worth of surveillance footage.
Display
Again, the CCTV display can be likened to a computer monitor or a TV display. In fact, computer monitors are used in most modern security devices today. The special software in the DVR device will allow viewing of several video streams on a single or on multiple monitors simultaneously.
So now that you are more familiar with the components of a modern CCTV camera system, go ahead and figure out what kind of a CCTV security system would be best for your home protection and for your budget.
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