Incurred ~16 dropouts over the last 48hrs with ~5m outage per dropout. So I finally cracked the shits and run up my ISP to figure wtf was going on. 🤔 Turns out after a quality test on the line it was showing ~5-6DB average SNR 😱 So filed a fault with the infrastructure provider (NBN Co) whose own equipment picked up the 16 dropouts and also found noise ½ way up the 450m Copper cable 😅

This has resulted in an availability of 99.8% for the Mills DC 😢 Not happy 🤬

Meanwhile have asked my ISP to switch me back over to what NBN call a “Stability Profile” where the DSLAM uses DLM (Dynamic Line Management) to manage the channels and noise and tries its best to keep the signal up. So far this has resulted in a ~10-20Mbps drop in bandwidth (down from ~90Mbps) but so far 🤞 an increase in stability and decrease in latency (less noise? better channels?)

Interestingly if you dig around, you come across this article:

Mitigating Amateur Radio Interference
to VDSL2 published by NBN Co, which basically states:

Some of the frequencies used by amateur radio
operators coincide with frequencies used by
VDSL2 technology, used by nbn to deliver nbn™
Fibre to the Node (FTTN) services.

And later on in the document on How vDSL works in Australia:

Prior to the deployment of VDSL2 technology for
FTTN, FTTB, and FTTC, the main DSL technology
employed in Australia was ADSL / ADSL2+ which
used signals up to 2 Megahertz (MHz). To achieve
much higher speeds than ADSL, VDSL2 expands
the DSL signal spectrum to up 17 MHz, which
happens to overlap with many Australian amateur
radio signal bands.