COMMUNICATION LINE STATE DISPLAY CIRCUIT

摘要

PURPOSE:To reliably display a state wherein data are normally transmitted. CONSTITUTION:A communication system establishes a data link by a polling/ selecting system. An error detection part 24 detects whether or not there is an error in received data. A sequence decision part 25 decides the establishment of the data link. When the error detection part 24 detects no error and the sequence decision part 25 detects the establishment of the data link, a light emission diode LED3 illuminates through an output part 26.