The Use of a Small Computer as a Communications Controller of Multi-User On-Line Systems

A programmed communications controller (PCC) has been designed using a small digital computer. The PCC is connected to a multi-user on-line system which controls nine experiments at the Brookhaven High Flux Beam Reactor. The purpose of the PCC is to process and switch all messages between sixteen teletypewriter terminals and the time-sharing system. The PCC serves "local" terminals at each experiment and "remote" terminals at distances up to one mile from the reactor. The PCC also controls message transfers between local and remote terminals. Arguments are given why a digital computer has been chosen rather than a hardwired device.