Ethernet(cat 5e) connector from my ISP is using only 1, 2, 3 & 6 pins. I connect to internet using PPPoE.
My old routers (TPLink C20 & Linksys E900) still detect this cable when plugged to WAN port. These old routers have fast-ethernet (100 Mbps) ports.
Couple of days ago I bought new router...