Actually, what you need to boost the signal to go longer distances is called a T1. I'm told that it's essentially the same technology, it's just that with a T1 they drop in a repeater every mile or so. And that's why T1's cost about a thousand dollars a month.

Of course, just because you're paying a thousand dollars a month doesn't mean you get any better service. I had one for a while a few years ago, and there was a month and a half when it went out every afternoon. Nothing really happened until enough outages racked up that I was able to tell them that they were teetering on the edge of their SLA and about to void the contract.

Then suddenly things started happening and it was all fixed within a couple of days.