Near my house is a 25-foot tower (that I and other residents built) that brings the Internet to our mountain community. A dedicated back-haul points to the ISP's data center in the town below, and the data is distributed via wireless APs on residents' homes. I have this connected to a Netgear router. With the ISP's permission, I laid fiber-optic line between my house and the tower, with fiber-Ethernet converters at each end, and the ISP plugged one end into their equipment. When a laptop is plugged into my end, the connection works and the speeds are fast. However, when I plug my cable into a router (tried Synology and Netgear) there is no connection. The chief tech from the ISP is at a loss as to why this should be. How would I begin to trouble-shoot this? Thanks for any help.