So, you are asking about going from your fbv pedal board, from the CAT5 input via ethernet cable to your PC's Ethernet connection.?
No. I'm sure you would need to use the USB for that function.
there is no usb function on the original fbv pedals
I really didn't think it was possible but I've done it, I actually have another dumb or silly question. Ok, I'm on a roll here, I promise I'll ask this then go to bed. Can you use a fbv express pedal as a midi interface ? It is one of the old fbv express pedals. The ones without a USB slot on it. Can you connect an Ethernet cable from the fbv express pedal and plug it into the Ethernet connection on my pc and it act like a midi interface to go with my Vox Tonelab Desktop? So that I can run my Vox Tonelab Desktop pc editor ( the software for the Tonelab ) at the same time?
no... unless you engineer some sort of go between device as you'd need power to the fbv....
you'd also only be able to use the commands it already sends that are setup for line6 devices, meaning you could not control the midi...
i assumed of course you meant midi controller, because making it into a midi interface is not really possible/practical.
honestly, my advice would be to seek another solution...
but you can get a decent price for a used fbv on craigslist or ebay... maybe that will help you get what you need.