[HECnet] Why does FAL generate this many reply packets?

I'm copying some files over from CHIMPY to RFSAXP and did a MONITOR DECNET in another window and got these rather strage results: CUR AVE MIN MAX Arriving Local Packet Rate 404.98 412.40 398.89 424.22 Departng Local Packet Rate 149.99 170.02 148.96 195.28 So I'm guessing FAL sends a BIG packet of data when transmitting a file, and the other side replies with multiple ACKs or something? Sampsa