Physical exchange system based on E1/T1 circuit

Abstract

The invention relates to a physical exchange system based on an E1 / T1 circuit, which comprises a main exchange system and a plurality of independent slave exchange systems, wherein each slave exchange system is freely connected with the main exchange system which is connected with a workstation terminal, each salve exchange system is provided with at most 64 paths of E1 / T1 signal interfaces, receives signals from the E1 / T1 signal interfaces and transmits the signals to the main exchange system; meanwhile, the slave exchange systems receive output signals of the main exchange system, divide the signals into at most 64 paths of E1 / T1 signals according to the information of channel numbers in the signals and send the E1 / T1 signal out. The invention can achieve the effects of simplifying the exchange control logic and design complexity configured by a user, shortening the data exchange delay, configuring a replacement 0-delay switching, not influencing the normal service and not losing data; the quantity adjustability of system interfaces is greatly increased, the usability is greatly improved, and the requirement for frequency jitter toleration of input data is wider.

Description

technical field [0001] The invention relates to a physical layer switching system in the technical field of network switching, in particular to a physical layer switching system based on E1 / T1 communication lines. Background technique [0002] Existing switching technologies generally refer to the switching above the second layer in the OSI model (Open System Interconnection Reference Model), while the switching of the first layer, that is, the physical layer, is rarely involved. However, in some environments, we urgently need physical switches to improve the automation of work or realize real-time monitoring of multiple devices. For example, experimental devices in some laboratories may need to be frequently connected and controlled on different terminals. , the connection can be completed automatically by using a physical switch, instead of using the low-efficiency manual plugging and unplugging method for operation. Such as figure 1 The figure shown is a typical applica...

AI Technical Summary

Problems solved by technology

At present, when a common physical switch is working, it first analyzes the signal received by the E1 / T1 interface according to the E1 / T1 frame format, searches for the corresponding output port, and then repackages the data and sends it out. Such an operation will bring The disadvantages are as follows: the delay of signal exchange is very large, reaching more than milliseconds, which is not suitable for delay-sensitive environments; the data processing process of the control module is complicated, and high-cost equipment must be selected for system design; the exchange configuration process Complicated, the switching system equipment is not easy to use; and the existing E1 / T1 switching system equipment has a small number of interfaces, poor scalability, and high cost of use. Take MRV's largest system NC316-288 as an example, it The maximum number of interfaces is only 288, and it is in the form of a chassis, which is insufficient in terms of scalability and ease of use, and is not suitable for environments with more interfaces.

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