On my TPlink Archer VR200v it happens at least once per week,
that the SNR drops from greater than 13dB to lower than 11dB (often to 5dB).
DSL Firmware Version: 184.108.40.206.0.7
When that happens only a
The SNR is back to over 13dB then immediately after the restart completes.
If i just wait, then it gets only worse until the restart happens automatically, in the middle of a movie. LOL
Why is that?
I mean: VDSL should recover automatically from temporary noise.
But: It looks like, on my box it does not, although the line is good.
Mmmh, in such cases it sometimes helps to look at the SNR margin for each individual sub-carrier.
One way to get started on this is found at https://github.com/moeller0/lantiq_dsl_parser, sure it is clunky and convoluted, but should allow you to get plots relayively quickly.
Like a good SNR plot:
and a bad SNR plot:
Notice the relative smooth drop in SNR over bins in the first plot, and the up and down roller-coaster in the second. In that case restarting the modem actually helped, because that lantiq modem of mine occasionally ended up in a bad situation where it could not get itself out of....