光纤分布式数据接口（FDDI）旨在用于高性能通用系统 多用途多站网络，设计用于高效运行，峰值数据速率为 100 Mbit/s。它使用以光纤为主传输的令牌环结构 中等的FDDI提供了数百个在数十公里范围内运行的站点 公里。 FDDI部分:令牌环低成本光纤物理层介质相关标准（LCF-PMD） 指定FDDI物理层的较低子层。因此，它规定了权力 光发射机和接收机的电平和特性，以及光接口 信号要求，包括抖动。LCF-PMD还指定了连接器插座 占地面积、合格FDDI光纤电缆的要求和允许的位 错误率。 LCF-PMD是FDDI的一套替代国际标准PMD之一。这套 包括原始PMD、单模光纤PMD（SMF-PMD）和双绞线 偏振模色散（TP-PMD）。

The Fibre Distributed Data Interface (FDDI) is intended for use in a high-performance general purpose multi-station network and is designed for efficient operation with a peak data rate of 100 Mbit/s. It uses a Token Ring architecture with optical fibre as the primary transmission medium. FDDI provides for hundreds of stations operating over an extent of tens of kilometers. The FDDI Part: Token ring low-cost fibre physical layer medium dependent standard (LCF-PMD) specifies the lower sublayer of the Physical Layer for FDDI. It thus specifies the power levels and characteristics of the optical transmitter and receiver, and the interface optical signal requirements including jitter. LCF-PMD also specifies the connector receptacle footprint, the requirements of conforming FDDI optical fibre cablings, and the permissible bit error rates. LCF-PMD is one of a set of alternative international standard PMDs for FDDI. This set includes the original PMD, the Single Mode Fibre PMD (SMF-PMD), and the Twisted-Pair PMD (TP-PMD).