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如何适应以太网 (FTTB +LAN)接入网的发展是宽带城域网建设中迫切需要解决的问题。文章介绍了采用Altera公司的ACEX系列器件 ,配以异步SRAM ,完成了具有可变比特率特性的以太网数据流和适合传统电信链路传输的具有固定比特率特性的E1数据流之间的相互转换 ,实现了以太网至城域骨干网的接入 ,并给出了转换模块中 4 / 16位变换器和SRAM接口模块的算法设计流程图
How to adapt to the development of Ethernet (FTTB + LAN) access network is an urgent problem to be solved in the construction of broadband MAN. This article describes the use of Altera’s ACEX family of devices, with asynchronous SRAM, has completed a variable bit rate characteristics of Ethernet data streams and traditional telecommunications link transmission with a fixed bit rate of E1 data flow between the mutual Conversion, to achieve the Ethernet backbone network to the metro access, and gives the conversion module 4/16 converter and SRAM interface module algorithm design flow chart