Digital CCTV cameras are getting cheaper and cheaper and storing the footage is so much easier in a digital format (as opposed to storing a tape library). Also, creating redundant backups (even using cheap online services like Mozy and Carbonite) is so much easier that analog CCTV systems will probably all but disappear in the next few years. Long story short, I don't see any disadvantages of using digital CCTV in this day and age.
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CCTV stands for Closed-circuit television and CCTV cameras are mainly used for security surveillance. CCTV cameras can be either video cameras or digital still cameras. The video cameras are usually used for video surveillance of houses or business places. The digital still cameras are used for traffic surveillance.
Using a cctv camera will help provide steady supervision because you can monitor at any time of the day and the camera almost never goes out due to its sturdyness.
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Microchip Expert gives training for how to install and networking of cctv cameras. We give all faults troubleshooting of all cctv camera. We provide training about ip camera, network based camera, bullet camera, domo camera, ccd camera etc. After completing this course you are able to do any type of projects of cctv. We give fully practical based training in our cctv lab.
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Closed circuit television camera is the full form of cctv camera.
Video camera data can be captured for later review or viewed live using a specific screen, computer monitor, or TV. Even an untrained homeowner won't have trouble understanding a variety of technical difficulties including picking all-weather cameras for outdoor surveillance, using low-light shooting modes, installing multiple CCTV cameras for home at once, calculating the viewing angle, etc.
close camera
Yes you can upgrade form a 4 camera system to an 8 camera system by adding to your current 4 camera a cctv security camera system. Or you can also buy another cctv security camera system and connect it to your current system.
Try Gotocamera.com, I am using this for my office monitoring. Here, you just need a webcam and a computer.