Six miles is probably pushing it, but Proscend make some interesting Long-Range Ethernet SFP transciever which are VDSL based. They're horrendously documented and they draw *way* more power than the SFP specification allows.

They also make a version which is design to terminate VDSL broadband circuits - A couple of those found their way to my desk recently and it turns out that despite the horrendous documentation and sightly scary heat output (they come with a little paper note in the box which says something along the lines of "WARNING! MODULE GETS HOT - DO NOT TOUCH DURING OPERATION."), they do generally Just Work!

On Wed, Dec 12, 2018, at 9:25 PM, Nick Bogle wrote:

A quick question for you guys;

If you had a single dry pair (pair of copper wires originally for phones) to a remote site that was around 6 miles away, what would you use? We currently are just extending a T1 line to this site, but 1.5Mbps isn't cutting it anymore. Unfortunately it's a research site on a federally protected wildlife preserve so we can't run any new infrastructure (fiber etc) and it isn't in a geographical place where point to point wireless is practical. We were thinking there is some sort of network extender that uses some form of DSL for higher bandwidth capacity.