Differences between semi-digital and all-digital systems
Literally understand that the semi-digital video intercom system is a combination of analog signals (bus-based transmission) and network signals (TCP/IP protocol), in-building to client-side (visual extensions), and the equipment transmission adopts traditional simulation. Signal, networked to the computer room part adopts TCP/IP digital signal transmission.
The semi-digital video intercom system is a kind of community intelligent system between the analog video intercom system and the digital video intercom system. It is mainly used in residential quarters, and its advantage lies in the long transmission distance and low signal attenuation. Because the indoor terminal uses a simulation system, the cost of the entire system will be greatly reduced.
The entire system consists of a digital management center, a master switch, a networked optical fiber (or network cable), a unit switch, a digital-to-analog converter, an analog unit doorway, a main line in a building, an entrance door power supply, a floor relay box, a system power supply, and an analog indoor room. As an extension.
Differences between semi-digital and all-digital systems
The difference between the hardware of the semi-digital system and the all-digital system
The semi-digital system just uses the digital signal transmission in the networking part as its name suggests. The all-digital system uses the digital signal transmission from the residential terminal to the management center.
The difference between the use of semi-digital and all-digital systems
In practical use, the semi-digital system is suitable for general residential projects with long-distance networking and relatively large communities, which can ensure long-distance transmission problems and save costs. The all-digital system is suitable for conceptual and differentiated real estate applications. The system not only meets the functions of a general video intercom system, but also realizes various functions of the smart home, such as: monitoring deployment, perimeter security, remote Unlock, elevator linkage and so on.
Full digital video intercom system summary:
Because the function of the all-digital video intercom system is much more powerful than that of the semi-digital video intercom system, and the post-maintenance of the all-digital video intercom system is more convenient than the semi-digital video intercom system. The digital video intercom system will save a lot of costs in the post-maintenance, so more and more community villas are now choosing to use the all-digital video intercom system.
How to distinguish half numbers from all numbers
Distinguish one way Although the analog video intercom wiring way on the market at present all have the original complicated wiring way to turn into one-line system (namely ultra five kinds of network lines), and the wiring way of pure digital video intercom is also one-line system (namely ultra five kinds The cable), to a large extent, caused the demander to create such a mentality: the system using the cable is a digital system. This is the most basic point. Let's continue with the second article.
The distinction between two-pure digital visual building intercom systems is that there is no distinction between black and white video intercom and color video intercom, as long as it is a purely digital video intercom system that is a color video intercom. Some unscrupulous manufacturers use the one-line color visual intercom system to fool the demanders who do not understand. If the manufacturer tells you that it is a demand for digital black-and-white video intercom or digital color video intercom. Congratulations! Don't read down. When manufacturers talk to you, you should know that they are analog products. If the manufacturer does not say this, then please continue to look at the third article.
Differentiating three-pure digital visual building intercom is to follow the TCP/IP protocol products, intermediate switching equipment can be just an ordinary network switch (all streets and lanes have to sell), and some unscrupulous manufacturers independent research and development of private network switches is Using floor distributors and networking controllers to synthesize the same shell as the network switch to fool customers. Whether demanders can purchase network switches themselves, if the manufacturers answer: they must use their dedicated network switch, congratulations! The simulation product that has approved the coat wants you to beckon. If the answer given by the manufacturer is: Where to buy the network switch wherever it is needed, just ensure the quality of the switch. Demands don't worry first, take a look at the next one.
Distinguish between four pure digital building intercom systems Each machine has an IP address bar, port, and MAC address. The semi-analog semi-digital system cannot do this. If the manufacturer says: The IP of the indoor unit is randomly set, as long as they are on the same network segment, congratulations! The digital product you want is found.
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