A terminal-oriented communication system

  • Authors:
  • Paul G. Heckel;Butler W. Lampson

  • Affiliations:
  • Interactive Systems Consultants, Palo Alto, CA;Xerox Palo Alto Research Center, Palo Alto, CA

  • Venue:
  • Communications of the ACM
  • Year:
  • 1977

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Abstract

This paper describes a system for full-duplex communication between a time-shared computer and its terminals. The system consists of a communications computer directly connected to the time-shared system, a number of small remote computers to which the terminals are attached, and connecting medium speed telephone lines. It can service a large number of terminals of various types. The overall system design is presented along with the algorithms used to solve three specific problems: local echoing, error detection and correction on the telephone lines, and multiplexing of character output.