Realize the circuit of inter-segment official business

Abstract

The invention discloses a circuit for realizing cross-segment business, which includes a cross-segment business signaling circuit and a cross-segment business voice circuit; the cross-segment business signaling circuit is used to receive the business signaling sent by the MCU and convert it The universal asynchronous receiver / transmitter that sends out the serial code stream; and receives the serial code stream sent by the asynchronous transmitter, and performs level conversion and sends it to the level conversion unit of the peer device; the cross-segment business voice circuit It includes a codec for converting the received digital voice signal into an analog voice signal, an op-amp unit for receiving the analog voice signal to achieve inversion, and a voice transformer that completes the signal loop to generate induction by using the forward and reverse analog voice signals; The stations of the segment are connected by cables. The present invention realizes cross-segment business affairs by separately transmitting voice signals and signaling. The circuit structure is simple and easy to realize, and the electronic components involved are all common components, which is convenient for procurement and mass production.

Description

technical field [0001] The invention relates to the field of business communication of an optical communication system, in particular to a circuit for realizing cross-segment business. Background technique [0002] In SDH, MSTP and WDM systems in the field of optical communication systems, such as figure 1 As shown, the implementation method of official communication is: [0003] (1) Use the telephone interface circuit to realize the connection between the codec (CODEC) and the telephone; [0004] (2) Utilize the CODEC circuit to realize the coding and decoding of the voice signal; [0005] (3) The coded digital signal and the official signaling generated by the MCU are inserted into the E1 and E2 buses through the FPGA or the time slot switching chip; [0006] (4) The optical line disk reads E1 and E2 bytes from the E1 and E2 buses and inserts them into the optical path overhead and in the opposite direction. One business unit can support business interconnection communi...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that business communication is mainly realized through in-band E1 and E2 bytes, but in practical applications, there are occasions where there is no optical fiber connection between devices in the same office to realize business communication functions, for example: between end stations of WDM devices, due to some The OSC of the terminal station has only one optical direction, and this optical direction is connected to the communication link of this section, so it cannot realize official communication with other stations

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