A terminal-oriented communication system

Paul Heckel and Butler Lampson


Citation: Comm. ACM 20, 7 (Jul. 1977), pp 486-494.

Links: Abstract, Acrobat, Here is an HTML version created by OCR for the benefit of search engines; it is not meant for human consumption.

Email: blampson@microsoft.com. This paper is at http://www.research.microsoft.com.



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.