Importance

Loading Importance Indicators...

Abstract

A new, multi-user data communication system is presented which is inexpensive and does not require any hardware changes to the central processor/system host. The standard serial data input/output port of each terminal is adapted from the standard single-user configuration to a party line, multi-user configuration by the addition of a simple and inexpensive interface circuit within each terminal. After the interface circuits are installed, the terminals can be interconnected to each other and to the central processor/system host using standard serial cabling. The party line interface circuit allows each terminal to access the non-busy serial data bus on a first-come-first-served basis. An interference detector and interference handling circuit are provided also to prevent data errors in the event of a possible data collision.

Loading the Abstract Image...

First Claim