reply to thestealth
Re: Fibre Installers Running the Cat5e through surge protectors (like a UPS) on either side might help with that, as would running better cable (like shielded cat6a).
Another option is VDSL2-based extenders, which you would use over a single 200m cat6 segment, and should be able to easily do 100 megabit over that length. Here is one such example, rated at up to 1000m (although you'd not get full speed at that distance):
Also there is the possibility of coax-based extenders, such as this one that is rated for 112 Mbps at 900m and 64 Mbps at 2400m:
Fiber would definitely simplify things in that there would be no electrical continuity, no possibility of noise from the environment...
Developer: Tomato/MLPPP, Linux/MLPPP, etc »fixppp.org