As is known to all, connected to the analog surveillance camera is a digital hard disk recorder, referred to as: DVR (DIGITALVIDEORECORD); connected to the network surveillance camera is a network hard disk recorder, referred to as NVR (NETWORKVIDEORECORD). Let's take a look at the differences between them. Let's take a look.

Appearance similar interface is similar

Intuitive look at the front of the two DVRs, it is difficult to distinguish between the two. But looking at the interface on the back of the two devices, you can quickly distinguish them. This is because the digital video recorder (DVR) has a video interface on the back and a BNC connector. Each interface represents an analog surveillance camera that can be connected to a plug-and-play, very convenient. The back of the network hard disk recorder (NVR) does not. For the video interface, if you want to access multiple surveillance cameras, you need to use the switch.

High and low market demand varies

In terms of price, the price of digital hard disk recorder (DVR) does have certain advantages. Through the e-commerce website, the price of some entry-level DVRs can be bought at around 300 yuan. The price of network DVRs that meet the same requirements is now almost the same, and the price gap between the two is narrowing. In some different projects, NVR will become the first choice.

Simple wiring NVR advantage

In terms of price, DVR has no advantage. In terms of integrated wiring, DVR is more obvious as "powerless." If users want to add an analog surveillance camera, they need to reproduce the wiring. It seems that the workload is not big, but the actual operation is not simple. The NVR has a good performance in increasing the monitoring point. The network surveillance camera can rely on the existing cable to avoid the problem of repeated wiring. Simply connect the network cable directly to the switch, and the operation is simple and convenient.

Since the cable of the analog surveillance camera is a 75Ω coaxial cable, the digital video recorder (DVR) cannot meet the long-distance transmission due to the distance limitation; and the cable of the network camera is the network cable, which can be used when long-distance transmission is required. Optical fiber transmission, the fiber not only has strong anti-interference ability, but also has low signal attenuation and higher security during transmission. Suitable for relatively complex projects such as factories, schools, etc.

Data security is the focus

Data security has always been the focus of security companies. For data that is not encrypted, there are big loopholes in the network transmission process. Does this indicate that the data in the NVR is not secure? Security vendors use AES code stream encryption and user rights non-matching mechanisms to ensure the security of the network transmission process, dispel the user's inner security risks, and fundamentally eliminate data security vulnerabilities.

In terms of system integration, the performance of both is also very obvious. The DVR DVR system is relatively closed, and it is difficult to integrate with other systems. Under the general trend of the Internet of Things, there is a clear phenomenon of "dropping". The NVR system is relatively open. In the case of ensuring data security, data transmission with other systems can be easily realized by physically connecting and matching the corresponding network protocol.

According to the current market, the NVR is almost ready to replace the DVR, especially after seeing the clarity of the network camera. The new project will not use the analog camera as long as it can be used, so the DVR is fast. The elimination has been the law.

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â… .DESCRIPTION

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High melting point polymer bitumen adhesive laminated to a 30-70 micron aluminium.

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â…¤.Technical Datas:

Aluminum Bitumen Butyl Tape

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