The invention realizes high speed data transmission, as known from the Fast Ethernet, with fieldbus systems in the field of industrial automation. A suitable fieldbus component includes a data link layer, which operates with a fieldbus protocol, and a physical layer, which is constituted for high speed...http://www.google.com.hk/patents/US6891849?utm_source=gb-gplus-share專利 US6891849 - Fieldbus components, communication system and process for the transmission of data over a high speed transmission medium
