• On the afternoon of October 17, Shanghai Metro Line 18 held a roll-off ceremony at CRRC Zhuji.  The project train is currently the highest level fully automatic driving train (GoA4) unattended during the whole process.Shanghai Metro Line 18 was initially equipped with 50 vehicles and adopted the national standard 6-section A-type car group, with a maximum speed of 80km/h.BEIHAI Communication provided on-board passenger information system for Shanghai Line 18 trains. For the GoA4 level, the passenger information system can adapt to a variety of scenarios for linkage, and it fully considers reliability and redundancy. The passenger information system of this project uses a highly redundant ring Ethernet architecture, with dual switches for each vehicle and power supplied separately...
    2019 - 12 - 26
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In the form of Q&A, this article aims to introduce the basic knowledge of fiber optic transceivers in the simplest explanations.     What is the fiber optic transceiver?It is a device that uses fiber optic technology to transmit and receive data. Transceiver is a combination of transmitter and receiver. It is used to convert the electrical signals and optical signals. What is the SFP or SFP+?SFP, Small Form-Factor Pluggable. Classified by package, SFP and SFP+ are two types of fiber optic transceiver. The main difference is that SFP+ is an updated version that supp...
发布时间: 2022 - 08 - 09
Views:6
As the application of optical modules in optical communication becomes more and more extensive, the speed, packaging, power consumption and functions are all developing in the direction of high speed, small size, low power consumption and multi-function. When you search the SFP, you always see that 'DDM support'. So what is DDM?What does DDM mean?Now let's talk about the Digital Diagnostic Monitoring (DDM) function. Definition of DDMDDM (Digital Diagnostic Monitoring), formulated by the industry organization SFF Committee, works in accordance with the standard parameters ...
发布时间: 2022 - 08 - 10
Views:6
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