Hmm, let's say I have a computer in my room (running on 500W PSU), with modem router (which means with the phone line and ethernet cable) together with speakers...

Then in another room, there is one computer (another 500W PSU) with printers and speakers, and the ethernet cable runs all the way to my room to the modem router...

How do I protect these equipments in both rooms? Is there any cost effective product/solution? My modem router/network card/PSU been fried for numerous times already, there was a time when the phone line was burnt black as well