NETZON diode solution realizes data transfer and migration between different security level networks under physical isolation. Instead of the traditional manual operation, the fully automatic, highly reliable robot moves the discs, and the batch loading of blank discs (or rewritable discs) and configuration of multiple CD-ROM drives greatly improves the efficiency of data exchange and reduces human factors problems. At the same time, the diode solution can be combined with the customer's existing system to realize the approval and auditing functions of data exchange, which is an ideal equipment to realize the data exchange between different physical isolation networks.