I've been using multi-gig [1] over short runs of cheap cat 5 cable just fine. Actually, I only have one span that links at 5G. The rest are short enough for 10G

I've been using multi-gig [1] over short runs of cheap cat 5 cable just fine. Actually, I only have one span that links at 5G. The rest are short enough for 10G with cat-5e, with 100m achievable with Cat-6! Talk about incredible! 1. https://community.fs.com/blog/what-is-multigig-ethernet.html https://community.fs.com/blog/what-is-multigig-ethernet.html