[WaitWaitWha]

I remember in the 90s when we were deploying a business campus, we first used ADSL services from the local carrier, but not for long.

We discovered we can get "dry lines", basically just rent copper run from site-to-site, nothing on it from local carrier. Slap ADSL modems on each and we got max throughout, at a fraction of the cost. Then we upgraded to SDSL, and that was like hitting the jackpot.

[IntelMiner]

I'm not sure if I'm reading this right. You got an unused copper line and stuck ADSL modems on both ends that talked to each other?

[WaitWaitWha]

Almost. Search "dry loop DSL" or "naked DSL".