【摘要】 针对目前网络交换机光电接口分立式设计带来的端口冗余和接入不灵活的缺点,本文介绍了一种异构网络交换机中光电一体接口卡的设计与实现。前端光电链路接口采用改进的SFP模块实现异构接入,后端通过FPGA的归一化MAC接口实现统一承载。文中给出了以吉比特串行收发器为中心的异构链路接入系统的设计思路与方法。重点阐述了电接口模块物理层欺骗的实现方法以及PCB的小型化设计,详细分析了接口卡中高速串行信号的信号完整性。通过电路仿真和实际测试,验证了该系统架构的正确性。更多还原

【Abstract】 This paper introduced a kind of fiber-copper unified interface card used in heterogeneous network switch. The front end link used improved SFP interface module to realize heterogeneous access, back end used FPGA normalization MAC interface to achieve unified carry. This paper gives the design methods of heterogeneous link access system using GTX as the center part. This paper focuses on the copper interface module, which cheat the MAC interface in physical layer and the miniaturization of PCB design. Analyze high-speed serial signal integrity of the interface card. Finally, verify the correctness of the system architecture by simulation and actual testing.更多还原