Supervisory and controlling equipment with transmission speed changeover function

Abstract

PURPOSE: To set the transmission speed of a supervisory and controlling information of a center device and a remote device at the time that a main circuit is busy at a high speed by providing a transmission speed detection circuit at the front stage of the communication port for transferring the supervisory and controlling information of a supervisory and controlling equipment. CONSTITUTION: The communication port 9 is connected to the communication channel 1 of data from the center device to the remote device, and to the communication channel 2 of the data from the remote device to the center device through switches 3,4, and also, connected to the center device by a public telephone circuit through the switches 6, 7 and a demodulating device. Besides, the transmission speed detection circuit 8 is attached to the communication port 8, and it inputs the data from the center device shown in figure 2, measures the transmission speed by the one character of a section T1, and outputs the result to the communication port 9, then the communication port 9 sets the measured transmission speed. Thus, the transmission speed of the supervisory and controlling information of the center device and the remote device at the time that the main circuit is busy can be set at a high speed without being limited within a speed realizable in the public telephone circuit. COPYRIGHT: (C)1988,JPO&Japio

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle