COMMUNICATION SYSTEM BETWEEN HOST AND TERMINAL

摘要

PURPOSE:To omit the need to change the system generation when the real terminal constitution is changed by setting previously a virtual terminal having the 1:1 correspondence secured between a host and an application program and connecting the virtual terminal to a real terminal with the designation of the application program sent from the real terminal. CONSTITUTION:The dynamic correspondence is secured between virtual terminals 31-34 and real terminals 41-49 via a switch means 35. When the real terminal 41 delivers a telegram indicating an application program AP2, a relay processor 30 checks the using condition of the virtual terminal corresponding to the program AP2. If said virtual terminal is idle, it is connected to a real terminal. Thus a communication path is secured and the real terminal performs the processing by means of the program AP2.