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目前大部分IP转E1设备还没有紧致型外围器件互联接口(CPCI),这里采用RC6105作为多路E1传输以太网的转换芯片,提出了一个带CPCI接口的四路E1传输一路以太网数据的设计方案,使设备通过CPCI总线与工控机无缝连接。介绍了基于CPCI的多路E1传输以太网的整体解决方案,涉及到网络物理接口器件(PHY)和介质访问控制器(MAC)的标准媒体独立接口(MII)连接,帧映射通用成帧规程、以太网帧封装映射及重组还原问题。
At present, most IP-to-E1 devices do not yet have a compact peripheral device interface (CPCI). Here, the RC6105 is used as a multi-channel E1 transmission Ethernet switch chip, and a four-way E1 transmission CPCI interface Ethernet data Design, so that equipment through the CPCI bus and IPC seamlessly connected. This paper introduces the overall solution of CPCI-based multi-path E1 transmission Ethernet, including standard media independent interface (MII) connection of network physical interface device (PHY) and medium access controller (MAC), frame framing common framing procedure, Ethernet frame encapsulation mapping and restructuring restore problem.