Two wires time sharing two way full duplex communication system

A two wire time sharing two-way full duplex communication system between master and slave terminals, comprising:

• a master terminal including a first transformer means, a master clock signal generating means for generating a repetitive pulse timing signal, a master digital signal generating means for receiving said repetitive pulse timing signal and for providing a master transmitting dipolar RZ pulse signal synchronized with said repetitive pulse timing signal, a master transmitter means being connected to said first transformer means for transmitting said master transmitting pulse signal, and a master receiving means being connected to said first transformer means for receiving signals from said slave terminal and including a master discriminator means;
• a slave terminal including a second transformer means, a slave receiving means being connected to said second transformer means for receiving and rectifying said master transmitting pulse signal, a slave clock extracting circuit means for extracting a slave timing signal from said received master transmitting pulse signal, a slave digital signal generating means for providing a dipolar RZ slave transmitting pulse synchronized with said slave timing signal, and slave transmitting means being connected to said second transformer means for transmitting said slave transmitting pulse signal;
• a two wire transmission line means, a first end of which is connected to said first transformer means of said master terminal, and the second end of which is connected to said second transformer means of said slave terminal;
• whereby, said master terminal and said slave terminal alternately transmit one bit of digital signal on said transmission line means to achieve simultaneous two way communication.