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ESCON(Enterprise Systems CONnection) An IBM S/390 fiber-optic channel that transfers 17 Mbytes/sec over distances up to 60 km depending on connection type. ESCON allows peripheral devices to be located across large campuses and metropolitan areas.
Compared to the copper-based, parallel bus and tag channels, ESCON provides greater speeds and uses a serial interface. An ESCON Director is a hub-and-spoke coupling device that provides 8-16 ports (Model 1) or 28-60 ports (Model 2). See FICON and EMIF.