[user5994461]

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.

[direwolf20]

Gigabit Ethernet uses four pairs per direction. It uses the same four pairs in both directions at the same time.

[estimator7292]

1000Base-T uses two pairs per direction, actually. It's full duplex. Each port sees two TX and two RX pair.

There are four pair of wires in the cable. If you use all of them for TX, you can't receive.