[nixgeek]

You can shoot light over SM at distances up to 200km (several important caveats at this distance) and it’s very usual to see spans of between 50-80km.

[wil421]

Looking further you can get a UFiber OLT Terminal for $1,799 that can run 20km and support 1024 clients or 128 ONU CPEs per port.

How much would a 200km switch run?

[Nikbul]

At this distance you would want a good repeater at about half point instead. Don't forget that data has to travel back and other side might not have such a strong signal

[iptrans]

The switch does not care what kind of optics you use. You can use a $50 switch is you like.

The 200 km optics, however, cost about a grand each.