The Development History of Fiber Optic Connections
2025-10-21
Fiber Connectivity (FICON) is a high-speed input/output (I/O) interface that connects a computer host to a storage device. As part of the IBM S/390 server, the FICON pathway increases input and output capacity by combining new structures and faster physical line speeds. FICON's speed is 8 times faster than enterprise management system connectivity (ESCON - IBM's previous fiber channel standard).
The characteristics of fiber optic connectivity (FICON) channels include:
A mapping layer based on the American National Standards Institute (ANSI) standard fiber channel physical and signal interface, which specifies signal, transmission, and transmission speeds.
At a distance of 20 kilometers, there is a bidirectional line speed of 100Mbps, while the corresponding ESCON channel has a speed of only 3Mbps at a distance of 3 kilometers.
There is more flexibility in network layout as it can be used over longer distances.
Compatible with any device channel type on the S/390 G5 server.
Bridge function, which can support existing ESCON control units.
Only one channel address is required.
Supporting simultaneous bidirectional data transmission, it can simultaneously read and input data on one line.
Multi channel technology enables a small amount of data to be transmitted together with other large amounts of data without having to wait for those large amounts of data to be transmitted completely.
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