Visual intercom working principle and purchasing skills

What is a visual intercom? What is the focus of the video intercom buying skills? The video intercom is a set of modern residential services, providing two-way visual communication between visitors and residents, achieving dual recognition of images and voice. This increases safety and reliability while saving a lot of time and improving work efficiency. More importantly, once the door magnet, the infrared alarm detector, the smoke detector, the gas alarm, etc. installed in the home are connected to the security type indoor unit of the video intercom system, the video intercom system Upgrade to a security technology prevention network, which can communicate with residential property management center or community guards wired or wirelessly, thus providing security protection against theft, disaster prevention, gas leakage, etc., providing maximum security for homeowners' lives and property. The degree of protection.

Visual intercom working principle

Video intercom, alias is a building intercom or video doorbell, the English name is Video door phone or Video door bell. It was introduced from developed countries in the 1990s and has achieved rapid development in China. From the end of the 1990s to the present, it has mainly been applied to commercial residential buildings, and its scale has developed rapidly. It has generally entered high-rise residential buildings in urban communities. When in use, the resident hears the ringtone, like the answering of the videophone, accepts the call from the host through the downstairs door host, and the video extension can receive the video image through the downstairs host camera, and the household observes the extension display. The monitor image on the screen confirms the identity of the visitor, and finally decides whether to press the unlock button of the indoor extension to open the electronically controlled door lock of the host connected to the door, allowing the visitor to open the door.

The video intercom is an audio-visual communication system between residents and residents in residential quarters. It is the first line of defense against illegal intrusion in residential quarters. Through the setting of this system, the residents can use the intercom/visual intercom extension at home, and can talk to the visitor through the intercom/visual intercom door host located at the door of the unit building and can pass the extension screen. The image identifies the visitor. When the visitor is confirmed, the resident owner uses the door lock control button on the extension to open the electronically controlled door lock on the main unit door of the unit building, allowing the visitor to enter; otherwise, all non-unit staff and strange visitors are Can not enter.

The system can also be connected with emergency alarm button, infrared detector, magnetic door magnet, smoke detector, flammable detector and other alarm equipment, and timely notify the management center of illegal intrusion, fire alarm, gas leak, emergency help and other information. Providing convenient and safe living for residents and reducing the reluctance of residents to be disturbed is also a reflection of the grade of residential communities and the status of residents.

Video intercom purchase points

With the improvement of intelligent community construction and the application of video intercom system in the community, what problems should be paid attention to when selecting products?

Domestic product advantage

Some developers or contractors always think that imported products must be better than China's, so even if the imported brands are much higher than the domestic brands when they choose, they should choose to import. This does not rule out the need for some developers to speculate. If only from the perspective of technology and quality, some domestic brands have already reached or even surpassed imported brands, and in many respects have greater advantages than imported brands, which are embodied in:

1, video intercom system capacity

The size of China's residential quarters is small, hundreds of households, and there are thousands of households, mainly based on buildings, which is unimaginable in Western countries with relatively small population density. Therefore, the capacity of the intercom system in foreign countries is far less than us.

2, visual intercom system environment requirements

The communities developed in China can only be counted as bad rooms. Most families have to renovate after purchase. Each decoration will cause certain damage to the system, and the period of staying in the community may last for several years. In view of this situation, domestic powerful companies put the resistance to cracking and anti-interference in the first place when designing the system.

3, the compatibility of the video intercom system

Due to the different requirements of the occupants, the residents of the same unit may have some visual installations, some require non-visual installation, some require no networking now, but will be networked in the future, etc., which are very important for system compatibility. High requirements. Fish and bear's paw

If the brand is a fish, then the bear's paw is a good after-sales service. There are three aspects to ensure the normal use of the system: first, product quality, second, engineering quality, and third, after-sales service. The video intercom system is the most frequently used system in the intelligent community. In addition to the harsh environment and decoration, the system is more prone to failure. Due to the complexity of the networking system technology, problems arise, and the general dealers and engineering companies cannot solve them, but they must be solved by the manufacturers. This results in a long maintenance period and the user cannot use it normally during this period. After the warranty period or the dealer changes, the risk of repair will be even greater.