A view from the the debugging tools since you asked https://thehftguy.com/wp-content/uploads/2026/01/screenshot_...

I don't think there is anything too fancy compared to a DSLAM. It's just that DSLAM are low-frequency long-range by design.

Numbers for nerds, on top of my head:

* ADSL1 is 1Mhz 8Mbps (2 kilometer)

* ADSL2 is 2Mhz 20Mbps (1 kilometer)

* VSDL1 is 15Mhz 150Mbps (less than 1 kilometer)

* Gigabit Ethernet is 100Mhz over four pairs (100 meters). It either works or it doesn't.

* The G.hn device here is up to 200 MHz. It automatically detects what can be done on the medium.