I am mainly used to the enterprise where most connections are deployed by some "normal" kind of fiber eg SFP+, QSFP+, SFP28, QSFP28 and those modules are almost fool proof, run cool and are reliable. Like most normal admin users, I like to use my own hardware for routing and switching rather than the often poor equipment provided by the ISP, especially when you have enterprise hardware that will be more reliable. The normal path is that you would just take the fiber op........

In most of the Cisco router IOS I find the ports like ge0/0 ge0/1 and ge0/2 or whatever your ports are down. They will not even give you a link light. So one of the first tasks should be getting the port you are working with up. In my case the first goal is often connectivity with the LAN and WAN. LAN = your local area network (eg. in the office/home ) WAN= your ISP/public internet (eg. fiber/cable/dsl/ethernet).........