How the data transfer would have worked, is that Taito would send the data streams to JSB's satellite base through an RJ-45 connector. From there, JSB would transfer the data to satellite, and the WoWoW's receiver would detect the data and store it into the receiver memory. From there, the subscriber would select the downloaded game and it would run from the receiver memory.
According to an Unseen 64 interview with Taito engineer Yukiharu Sambe, who was the R&D manager of the project, the WoWoW wasn't released due to data transfer speeds being slowed down by error correction packets. Cost was also a factor. At the time, combining a video game console and a satellite receiver into a single package wasn't feasible, and would have made the console's retail price too expensive.