Long-line network switch based on VDSL2 and multistage cascade technology thereof

Abstract

The invention relates to a long-line network switch based on a VDSL2 and a multistage cascade technology thereof in the data communication field. The long-line network switch comprises an abnormal state data flow direction control unit, a two-way hybrid VDSL2 long line access unit, a VDSL2 master control unit, a switching unit, a network data exchange unit, several Ethernet ports and an intrinsically-safe power supply unit. Seamless fusion of an Ethernet technology and a VDSL2 long line access technology is realized and a new mode of long line network access is initiated. The switch and the technology of the invention are served as a powerful supplement for a gigabit Ethernet ring network. Simultaneously, the unique two-way hybrid VDSL2 long line access unit and the switching unit are used to realize multistage cascade access of the long-line network switch so as to reach a purpose of point-to-point long-distance large-data-volume data communication. The switch and the technology of the invention possess the following advantages that a transmission distance is long; intrinsic safety is achieved; a bandwidth is high; wiring and cost are saved; management is easy. The switch and the technology can be widely used in ground and mine data communication fields.

Description

technical field [0001] The invention relates to a communication device and a multi-level cascading technology, in particular to a VDSL2-based long-line network switch and a multi-level cascading technology. [0002] Background technique [0003] With the development of communication technology and economy, more and more network devices are used underground in coal mines, and most mines have their own underground Gigabit Ethernet ring network, but traditional Ethernet electrical signals can only transmit 100m, optical signals Although it can transmit a long distance, it is difficult to move the optical cable, the mobility of the optical fiber equipment is poor, and it is easy to break, and it is very difficult to melt the fiber safely underground, and there is no intrinsically safe fiber melting equipment at all. Devices are difficult to access. [0004] Gas has always been a major hidden danger in coal mine safety production, so it is particularly important to comprehensiv...

AI Technical Summary

Problems solved by technology

In the process of gas drainage, the distance between the control area and the extraction area ranges from one to two kilometers to as many as four or five kilometers. Due to the lack of long-distance and large data volume transmission equipment in the existing technology, the visual technology of gas drainage has never been achieved

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