Gigabit point-to-point data link system with cascaded optical fiber channels

摘要

Abstract: A station implementing the Accredited Standards Committee (ASC) X3T9.5 fiber distributed data interface (FDDI) physical layer communications protocol standard can transmit and receive data simultaneously at a data rate of 100 Mb/s through a pair of optical fiber cables or fiber channels. Each station, with multiple physical layers and their associated fiber channels connected together in parallel, can transmit and receive data at a much higher rate. National Semiconductor's physical layer (PHY) devices can be conveniently connected together to achieve a gigabit bandwidth point to point data link system, whereby the bandwidth is directly proportional to the number of PHY devices used. !2