@mggartner etherregen is technically and logically an unmanaged switch. It uses however an internal flip-flop for isolation and reclocking. So in this regard it is unique but in no way I would call it a repeater.
you said that your split cable (with a very expensive one ) and a switch you reduce Jitter. As a basic switch does not rely on its internal clock for any jitter relevant operations, I assumed, maybe wrongly, that you think a cable has such an effect. my bad!
However, normal TCP/IP traffic DOES NOT have any timing embedded. Some QoS or such, but not actual timings. Why do you think that a highly accurate flip-flop is questionable then?

