Building Intercom System: Advantages of Digital Networking Technology
October 25, 2022
The building intercom system as a necessary equipment in the intelligent community has been widely used in newly-built buildings in various places. With the rapid emergence of large-scale communities and how to solve the problems that arise in networking, the problems that arise in networking are: From the current situation of the use of building intercom systems in many communities, it is still the networking problem that has the most complaints. The networking problem is mainly manifested in the fact that some of the intercom systems may not be able to implement part of the networking functions or be unstable after the system is networked. The key is to solve two problems: First, the long-distance transmission of video signals, audio signals, and data signals. Stability issues; Second, how to solve the problem of busy (that is, to achieve multi-channel), the multi-channel concept refers to the multi-channel call can be realized at the same time in the cell-site intercom system, and the probability of the call of the management center and wall machines is fully reduced.
In traditional analog intercom systems, when the size of a cell is too large, or if there are many floors, the problem of signal blurring due to excessive video transmission distance will inevitably arise. At the same time, there are congenital weaknesses in multi-channel problems. It is very difficult to overcome the solution.
The use of digital technology can solve these two problems well. That is, the networking part uses the standard TCP/IP protocol to transmit compressed-encoded audio and video digital signals. Since video, audio, and control information are all digital signals, there is basically no signal attenuation problem and it is easy to meet long-distance transmission requirements. In addition, the networked physical network uses a standard Ethernet architecture and network sharing to easily meet the requirements of multiple channels.
Its outstanding advantages are as follows:
Reuse the broadband network of the community and save the cost of the system The standard Ethernet structure of the networking part of the digital networking system not only facilitates independent networking but also can reuse the residential broadband network constructed by the telecom operators, saving the investment in switches and wire parts. Further reduce the system cost and also ensure the reliability of the networked system. In addition, the Ethernet RJ-45 interface has a complete electrical isolation function, using fiber optics for long-distance transmission, these provide perfect lightning protection for the system.
The network is non-blocking, and the lossless network of the signal adopts the standard TCP/IP protocol to transmit digital audio and video signals. The multi-channel video can be easily called at the same time, and the alarm signal is transmitted in a timely and reliable manner without any worry of being busy. Due to the digital transmission of audio, video and data signals, there are no transmission distance limitations and any size of cell can be used.
Capacity expansion is unlimited, and the expansion capability is strong. The network adopts the standard open TCP/IP protocol, standard signals and standard interfaces of the equipment in the unit, and devices in different periods and devices in different areas can be seamlessly connected.
Wiring, opening, debugging, and maintenance are convenient. Simple system networking is transmitted in a digital way. Standard LAN is used for laying. Networked lines can use existing residential broadband lines. The system uses a single CAT5 cabling with only one wire and one RJ-45. Crystal head, you can quickly and easily complete the construction of wiring; Compared with ordinary analog intercom system, networked intermediate equipment greatly reduced; system commissioning simple.
