In recent years, intelligent building has developed from office buildings to residential buildings, with modern buildings as the platform, with computers as the core, with communication networks as the support, the comprehensive use of modern control technology and other means, the security, anti-theft alarm, broadband, central air conditioning, integrated wiring and other systems integrated intelligent buildings. With platform as the center and security, information application and information application, intelligent building walkie-talkie has become the optimal combination of security, service and management. In modern security more mature and important. Building intercom from the early 1990s into China, experienced more than 30 years of development, from non-visual to black and white visual, from black and white visual development to color visual, and from color visual upgrade to home intelligent terminal, the system from a single family not networking to networking, and from a variety of bus networking to the use of mature TCP/IP digital technology networking. Building intercom has been widely used in intelligent residential areas.

Visual intercom advantage analysis

With the development of building intercom products, modern building intercom is mainly visual intercom, compared with traditional intercom, visual building intercom advantages are more obvious.

Compared with the analog visual intercom system transmitted by the dry bus system, the digital visual intercom system is much more convenient in terms of wiring and installation and debugging. Since the digital visual intercom system uses TCP/IP to transmit sound, data and image signals, a network cable can solve all problems, greatly simplifying the wiring project, making the installation and debugging of the residential intercom system simple, and the construction period is also greatly shortened.

When all signals are digitized, it is easy to meet the needs of networking. The indoor unit of the digital video intercom system is like a small computer, which has a high-performance CPU and DSP digital processing chip. The powerful data processing capability makes the networking function powerful and provides more convenience for the integration of other security subsystems.

Now the community development scale is getting larger and larger, the use of image amplifiers and other solutions, can also extend the transmission distance to a few kilometers, but the cost of realization is too high. The visual intercom system based on TCP/IP has no distance limit and can achieve low-cost long-distance transmission.

IP networking has strong scalability, it can not only achieve visual intercom, but also achieve multimedia information transmission, broadcasting, security alarm, smart home, IP video phone, VOD, image monitoring and value-added services and other functions. If you access the Internet, you can configure, monitor, remotely upgrade, and remotely read meters for any terminal (video intercom) on the Internet. It can not only meet the traditional visual intercom application, but also provide security alarm, smart home control and other functions, becoming the core hub of the "digital home".

For a long time, there has been a fixed idea in people's minds: "New technology means high prices, and new products must be more expensive than traditional products." So, as a technology leading digital intercom system, must be higher than the traditional analog visual intercom system cost, cost? In fact, from the installation and debugging, wiring point of view, the use of TCP/IP transmission mode, can reduce a large investment, plus the construction period is shortened, saving wire and labor costs, easy to maintain, therefore, the use of digital visual intercom system, more advantages in cost.