A random websearch turned up a 2008 blog article in Japanese regarding the xs37 (a model sold only in Japan) with a "Navi from Net" feature called Net Dub.
Net Dubbing is a term for Network Copying or "Duplicating.. hence Doubling.. or Dubbing" a rcording to another xs37 or other recorder.
As a hand held remote "workstation" for mastering and creating DVD recordings.. shuttling recordings before editing from one workstation to the other was taken into account as a desirable feature. The recordings are "not" transcoded but are at the same resolution as they were in when originally recorded.
PCs don't normally participate in Net Dubbing.. however they can with a simple protocol daemon that listens for a Netbios broadcast requesting XS recorders identify themselves with their Anonymous FTP server paths.
A simple systray windows application was created and released as Freeware. I modified the text labels for English and the result was a Virtual RD-XS recorder service for the PC.
Starting this allows you to set a download path for recordings "pushed" to the PC from the Net Dub interface on the XS recorder. The title or name for a recording on the XS recorder is used as its destination filename on the PC. An extra txt file is created with any metadata associated with the recording.