Patent ID: 9749011
Date: 2017-08-29
CPC Classifications: H04B,H04L

Claim:
1. A physical unidirectional communication apparatus, comprising: a unidirectional data transmission line for transmitting transmission data in a unidirectional direction; a data reception status transmission line including N lines (N is a natural number), each of the N lines configured transmitting electrical On/Off signal to represent reception status information without being able to transmit the transmission data; an internal network connection system unit for performing communication with an internal network transmission host and transmitting the transmission data to an external network connection system unit through the unidirectional data transmission line; and the external network connection system unit for performing communication with an external network reception host, receiving the transmission data, from the internal network connection system unit, generating the reception status information of the transmission data, and transmitting the reception status information to the internal network connection system unit through the data reception status transmission line.