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

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.