Abstract: Communication control apparatus for interconnecting one or more digital devices to one or more other digital devices, or more specifically for interconnecting a moderate to large number of user terminals, main frame computer systems, minicomputers, remote digital devices, and the like, using some of the concepts inherent in statistical multiplexers, intelligent switches, and local area network devices, all implemented in a compact configuration to produce a flexible and cost effective approach to data communication interfaces. The communication control apparatus replaces and simplifies the actual terminal connections from the computer interface(s) and then adds substantial system enhancements for the manager while retaining software and protocol transparency. A local communication bus is provided for routing of data and control signals internally of the control apparatus.