There are stores like fs.com where you can buy affordable tranceivers for use in anything that'll take SFP+. The biggest hurdle is extracting the specifications you need from your ISP and configuring your own router for their weird quirks, and probably probably convince them to accept your serial number (or spoof a device of theirs if you can find the S/N).
There are also ONT/media converter boxes that'll spit out ethernet if you plug in a fiber and set the appropriate DIP switches. I found one hanging in my apartment when I moved in. I've also seen people sell them on second hand marketplaces (probably not realizing that they're technically property of the ISP). Buying newer ones that spit out more than 1gbps as a consumer can be a challenge, though.
There's a nice variety of small Linux router boxes available online that are relatively low power but still offer good connectivity through SFP(+) ports. Getting Linux running on those is easy, the challenge is in figuring out how to active the connection.
There are also ONT/media converter boxes that'll spit out ethernet if you plug in a fiber and set the appropriate DIP switches. I found one hanging in my apartment when I moved in. I've also seen people sell them on second hand marketplaces (probably not realizing that they're technically property of the ISP). Buying newer ones that spit out more than 1gbps as a consumer can be a challenge, though.
There's a nice variety of small Linux router boxes available online that are relatively low power but still offer good connectivity through SFP(+) ports. Getting Linux running on those is easy, the challenge is in figuring out how to active the connection.