This paper introduces the composition of the real-time signaling transceiver system designed and implemented using the high-speed processor DS89C420 of Dallas Company, gives the hardware structure diagram of the system, and explains the control function of the control module based on DS89C420 on each module; finally, it introduces the firmware design and application design. Keywords: DS89C420, signaling transceiver, serial bus, firmware program. Signaling system is one of the key technologies of modern communication network. Signaling network is the nerve center of communication network and has become an indispensable part in communication networks such as telephone network, mobile network and intelligent network. With the development of communication technology, the No. 7 signaling network has been widely used in telephone network, mobile network and intelligent network, becoming the nerve center of modern communication network. Therefore, as long as the \"neuron\" of No. 7 signaling network is monitored and analyzed, the quality of telecommunication network operation can be determined. At present, the more common method is to install the signaling acquisition conversion card based on ISA bus in the industrial computer, but the installation is more troublesome and is limited by the number of computer slots, addresses and interrupt resources, and the scalability is poor. Universal Serial Bus (USB) is a microcomputer bus interface specification jointly developed by Intel, Microsoft, IBM and NEC [1]. This bus interface has the advantages of easy installation, high bandwidth and easy expansion, and has gradually become the development trend of modern data transmission. The real-time signaling transceiver system based on DS89C420 makes full use of the above advantages of USB bus and effectively solves the defects of traditional signaling transceiver system. The \"real-time signaling transceiver system based on DS89C420\" collects signaling link data through the lower computer, and then sends the collected signaling protocol data to the upper computer through the USB interface. The upper computer conducts comprehensive analysis and processing on the received signaling protocol data, so as to judge the operation status and operation performance of the signaling network and the operation quality of the telecommunication services supported by the signaling network, track the call signaling process, timely discover the potential faults of the signaling network and the telecommunication service network, find the fault point, and provide a useful tool for troubleshooting. In addition, the lower computer can also receive the signaling protocol data sent by the upper computer through the USB interface, and send the received signaling protocol data through the HDLC in the DS2155 chip.
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