What are the components of the network building video intercom system?

It mainly consists of a door machine (household door machine), an indoor unit, and an administrator machine.

a. indoor extension

Indoor extensions mainly include two types of intercom and video intercom products. The basic functions are intercom (visual intercom) and unlocking. With the continuous enrichment of products, many products also have the functions of monitoring, security alarm and disarming, household access, information receiving, remote alarm, photo message extraction, home appliance control and so on. The video intercom extension has two major categories: color LCD and black and white CRT display. Nowadays, many technologies are applied to indoor extensions, such as wireless receiving technology and video character overlay technology. The wireless connection technology is used for the signal that the indoor unit receives the alarm probe, and is suitable for occasions where wiring is difficult. However, there are major loopholes in the wireless alarm mode. As the frequency transmission source continuously transmits, the host cannot receive the alarm signal sent by the control head. The video character overlay technology is used to receive short messages issued by the management center.

There are two main types of indoor unit design, one is the indoor extension with code, the branch can be simpler, but the indoor extension cost is higher; the other type of code is completed by the door host or branch, indoor The extension is very simple. The LCD screen of the color indoor extension has not been domestically produced yet, and the cost is high, which is a bottleneck restricting the application of the color visual building intercom system.

The appearance of the intercom extension is similar to that of the bread machine and tends to be diversified. The visual extension tends to be ultra-thin hands-free wall hanging, but the most popular is still the wall-mounted black and white visual extension. The indoor extension has a large cost in the building intercom system. From the perspective of development, the color extension with security alarm and information release is used in high-end real estate. The mid-range black and white video intercom extension is mostly, and the low-end matching is the right. Speaking of extensions.

b. Door host

At present, whether using visual indoor competition or intercom indoor extension, users mostly require a visual door host for users to choose. The door host is the key equipment of the building intercom system. Therefore, it is the main point of competition among manufacturers in terms of appearance, function and stability. The main material of the door is made up of aluminum alloy extrusion profiles, die-casting or stainless steel casing stamping and forming. In terms of effect, aluminum alloy extruded profiles have an advantage. The display interface of the door host has two kinds of liquid crystal and digital tube. The liquid crystal display has higher cost, but the display content is more abundant, especially the indispensable component for receiving short messages. In addition to calling the basic functions of the household, the door host must also have the function of the call management center. The infrared auxiliary light source and the night auxiliary keyboard backlight are the functions that the door host must have. The ID card technology and the cost reduction of the read head enable the induction card access control technology to be applied to the door host to realize the card unlocking function. In addition, for convenience of use, many products also provide ring back tone prompts, key tone prompts, call prompts and various voice prompts. Such functions make the performance of the door host increasingly perfect.

C. Management Center Machine

The management center machine generally has the basic functions of call and alarm reception, and is the basic equipment of the community networked system. The use of computers as management center machines has greatly expanded the functions of building intercom systems. Many manufacturers spare no effort to integrate the management software to integrate systems such as three-meter and patrol. With the system hardware, the management center connected by computer can realize the information release, community information inquiry, property service, call and alarm record inquiry function, and set the disarming record inquiry function.