Companies throughout the world are migrating to fiber optic technology. Optical fiber modems and multiplexers are readily available on the market today, and many local area networks make extensive use of them. When computer are linked together, the slow path between them can be a bottleneck. So the high speed optical fiber can be a complementary path to the high speed computer. Digitized voice conversations require a greater bandwidth than the typical telephone channel provides, especially if the converstions are in an interactive, real-time mode.
Optical fibers provide the bandwidth capability to accomodate real-time voice transmissions.
Packets maximum lenght is 4500 bytes. FDDI provides for failure recovery by bypassing problem nodes. It has station management capabilities. Up to 1000 nodes can be placed on the optical-fiber ring. The concentrator is a reconfiguration and concentration point for all optical wiring and data traffic.