​This demo gives an example of simulating two parts of power system on two different real-time simulators (RTS), which are connected by a Optical-Fiber link. Half distributed parameter lines or Stub lines are stimulated on each RTS, and exchange signals via a generic aurora protocol. This demo was made for co-simulation between Hypersim and eMEGAsim. However, the same method can be used to connect to RTDS with a dedicated protocol (blackbox mudule for Xilinx FPGA).