Different Categories of CCTV cameras.There are many ways to categorized CCTV cameras. We will use the following subheadings to classify CCTV cameras systems. Wired and wireless CCTV All CCTV systems have to record and transmit the documented picture. Based on transmission mode there exist two categories of CCTV cameras, Wired cameras, those that transmit their video signals via a cable Wireless cameras that require no signal transmission cable Wired CCTV systems typically use a communication cable similar to the one feeding antennas (RF cable). One major drawback in using wired CCTV cameras is that as the transmission range increases more than 300 meters, the signal may become weaker. To manage the problem, one should consider using appropriate networking cables (for example Cat6), as well as adding switches on the halfway, or use high-quality signal boosters. In a multichannel closed circuit TV system, several cameras are strategically placed at various locations and can be designed to be interconnected through a multi-viewer circuit to allow close monitoring from a single computer or screen. For a small house, to have non-messy interconnection, a multichannel system can use wireless CCTV cameras. Such cameras would negate transmission cables as only power lines would be a must, hence leaving behind a neat finishing. The wireless CCTV camera communication can cover 20 meters or even more. This might make such cameras ideal for complex structures. But, the big drawbacks are the strength of the wireless signal, which is determined by the infrastructure of how you design your wireless network. Scientific research has already shown that wireless signal can drop by up to 90% if it goes through a concrete wall with steel inside. This can become a big issue when connecting the wireless CCTV cameras - unstable connection, hence loss of video records, is simply can’t be accepted for surveillance CCTV cameras. Analog CCTV camera ( uses DVR) or Internet Protocol (IP Camera) (uses NVR) CCTV Leaving technologies behind, to normal users, the primary difference between analog and more digitalized IP camera is the video image quality, in term of sharpness and video image resolution. The IP cameras come under wired or wireless category of CCTV camera. IP cameras use NVR and can provide a much higher image resolution (megapixels) than the conventional analog TVL CCTV cameras. IP cameras are therefore preferred conventional analog TVL cameras due to the following reasons: They require less amount of cables to be installed: a POE IP cameras require only one networking cable connecting it to the video recorder. Provides much sharper images than analog cameras IP digital signals are not so prone to signal interference IP cameras are easily accessible through a Web browser. However, one major drawback in using IP surveillance cameras is that they are costly. A better option might be considering to use analog HD CCTV, in this article, we use HikVision HD-TVI CCTV camera as illustration. Although analog in nature, HikVision HD-TVI surveillance CCTV cameras can give high definition video images and possess night vision capability. One point worth noting about HD-TVI CCTV cameras is that they are compatible with the older analog non-HD types. Hence, one can easily upgrade to the HD-TVI CCTV cameras.