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扩展的光纤分布数据接口（ＦＤＤＩＩ）是一种可同时传输数据、语音及图像的多媒体高速网络．经过适当简化，可构成专用的光纤工业网（ＦＩＮ）．本文基于ＦＤＤＩＩ对各子层（ＭＡＣ，ＨＲＣ，ＰＨＹ，ＰＭＤ）的标准，通过总结和分析现已公布的ＦＤＤＩ及部分ＦＤＤＩＩ标准，明确了ＳＭＴ的功能，提出并设计了适用于ＦＩＮ的带有微处理器的智能型网络适配器．选用嵌入式芯片３８６ＥＸ作为微处理器，设计并制作了独立的智能型ＳＭＴ最小系统，完成了系统的配置程序．该系统实现了ＳＭＴ与各子层的接口，并模拟了同主机的通信．
The extended Fiber Distributed Data Interface (FDDII) is a multimedia high-speed network that can simultaneously transmit data, voice and video. After appropriate simplification, can constitute a special optical fiber industrial network (FIN). Based on the standard of FDDII for each sub-layer (MAC, HRC, PHY, PMD), by summarizing and analyzing the published FDDI and some FDDII standards, the function of SMT is clarified and a new micro- Processor’s intelligent network adapter. Using embedded chip 386EX as a microprocessor, we designed and produced a standalone intelligent SMT minimal system and completed the system configuration process. The system realizes the interface between SMT and each sub-layer and simulates the communication with the host.