On the building intercom technology trends and their wide application – building intercom – Security Industry
Building intercom system evolved from non-visible on black and white video intercom mentioned, black and white video of the mentioned type of security video intercom, but also to color video intercom, color video intercom network building can be developed to as the intercom (Family Intelligent Terminal), building intercom system from the development of independent systems to networked systems, from the way the bus network through the development of the semi-digital network, to further develop the use of mature TCP / IP network Technology Networking, from the single function type to a smart integrated control type, developed rapidly.
Digital China building intercom Market Are undergoing from analog to digital, from the bus system to a TCP / IP network transformation. Prior to 2007 TCP / IP building intercom Product The specific implementation of the still at the concept stage, to 2008, TCP / IP building intercom technology is maturing into a real product, and began to put on the market. Many in the industry generally reflected than in 2007 and 2008 the number of intercom products, IP network, integrated in a universal state clearly. Digital, TCP / IP technology began in the user market has been widely accepted, semi-digital intercom products, digital intercom products into the substantive application stage.
Through the development of the 2008 Beijing security situation was found, all TCP / IP technology, semi-digital intercom products are quite common. Many manufacturers of analog and digital combination of semi-compelling digital products, some manufacturers introduced digital intercom products have become the 2008 Beijing security exhibition highlights the prominent intercom series, shows, digital products has become on the intercom stresses the importance of indicators of technology development manufacturers.
Such as intelligent digital home Matsumoto 880 series is the all IP network transmission of digital building intercom system, door from the room extension to the machine, to the management center (PC) are using TCP / IP data transmission, due to network architecture based on IP network, with the fastest speed network communications and call features a full range of all households, also have a very powerful system extensions.
This stage, despite the traditional analog intercom systems still account for a large market share, but its shortcomings are increasingly prominent. For example in the wiring structure, the model would signal transmission network is divided into main bus (network) and the branch bus (unit). Device from the management plane, residential gate machines, cell door machines, door machines tenants secondary confirmation, indoor extension formed from the top-down hierarchical bus architecture. Management machine to plot the door machine, door machine unit is the backbone network cell bus, the unit entrance door of machine to machine to confirm the second household, indoor extension is the second branch of the bus. Trunk or branch, whether bus bus, voice, video and control signal lines are required for the laying of a separate dedicated cable, so cable type and quantity will be greater, which gave the system cost and engineering trouble.
Now, semi-digital approach has been more common networking methods, namely TCP / IP networking to the cell door machine, door machine unit to the door machine and indoor household use a conventional bus mode. It is understood that the reason is that TCP / IP networking in the wiring, networking, signal transmission, system scalability, functionality can be extended, easy maintenance, network interference, multi-channel communications capabilities, etc., have obvious advantage.
Then compare digital TCP / IP intercom system, wiring is much simpler and less, all kinds of signals (audio and video, control) all integrated together in just a digital cable transmission, simplifying the wiring, the system equipment installation, commissioning, maintenance is simple. TCP / IP networking is not only able sounds, images, control signal transmission, but also realized the block of flats, residential Intercom Equipment All network. Technology for system and network-based digital system can be used integrated audio and video codec module, ARM platform, its powerful data processing capabilities and hundreds of megabytes of bandwidth makes the original more than a single type of signal into digital signal so that signal transmission change too "simple", the signal quality significantly improved greatly improve anti-interference ability, and can achieve with the cell perimeter alarm, Access Control card, and community services system for seamless integration.
Traditional analog intercom bus system compared to prominent figures feel the IP intercom has the following characteristics: transmission distance without geographical restrictions, extend a very easy upgrade; transmission of audio and video, control signals is much better than traditional bus mode; can achieve family alarm Home Appliances Control, remote monitoring, community service and other functions integrated; installation convenience, reducing the project cycle, saving for the project.
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