由于以太网中的各种设备必需通物理层接口器件才能与网络传输介质相连，因此本部分主要介绍物理层器件。
Because all kinds of equipments in Ethernet must be though the physical layer interface devices can connected with network transmission media, thus this part mainly introduces the physic...
使用物理层网络控制芯片配合微控制器片内集成的EMAC以太网控制器，提供对网络传输的支持。
The system employs a Fast Ethernet Physical Layer Chip and EMAC embedded in MCU to support network transmission.
该网关在网络的物理层和数据链路层完成协议转换，解决了现场总线和以太网无法实现直接通信的问题。
The conversion was finished on the physical layer and the data link layer, and the problem of direct communications between fieldbus and Ethernet was solved.
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