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[NewtronStar]

It seems it is 160m band radio interference. Are those tones always missing?

The tones are inplace during the afternoon but 1 hour before sunset they start to go missing one by one until a large chunk of tones has gone and they will start to appear very slowly after 01:00 and by 12 noon they are all back again.

[konrado5]

Therefore, I'm almost sure someone broadcast radio in 160m band.

[NewtronStar]

Therefore, I'm almost sure someone broadcast radio in 160m band.

Yes it seems to be ! but how or why are these RFI signals getting inside my modem and I can say 100% that there wasn't any RFI in June 2013 as I have graphs going all the way back to August 2012 (HG612 Modem Unlock day) I remember it well 

[konrado5]

It is worth reading.
http://www.kitz.co.uk/adsl/rein.htm

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^^

[NewtronStar]

It is worth reading.
http://www.kitz.co.uk/adsl/rein.htm

Yes it is as four to six months ago I had terrible FEC errors 100,000 + per min and I found two culprits when setting the Radio Scanner to 512Khz what I found was the TP-LINK power adapters was causing 70% of REIN and and old Sony FreeView BOX (Digital TV) was causing 28% of REIN.
after removing those devices my FEC's never go above 14000 per min on a bad day.

thats my REIN fixed and my RFI is a different story   

[konrado5]

NewtronStar: serach if someone broadcast 40m amateur radio.

[JGO]

I suggest you should consider the problems as Crosstalk, not (external) RFI. In particular, even-order intermodulation at the exchange, would produce tone-like spectral lines at higher, near harmonic, frequencies. This would explain a mask blocking off these frequencies.

Listening with a receiver would show the difference between RFI and Crosstalk, a system designed round xDSL won't; (if you can't find any spectral lines at all, then interference only exists in the xDSL system so must be crosstalk ! )

[NewtronStar]

Wondering how crosstalk can be in sync with the Sun set times ? IE: sunset in December is at 15:58 here tones go missing and in April the tones go missing 4 hours later, sounds like radio propagation to me or street lighting.

[konrado5]

Wondering how crostallk can be related to 1650-1750 tone.

[konrado5]

kitz and burakkucat: I hope my reply #38 has not missed.

[kitz]

kitz and burakkucat: I hope my reply #38 has not missed.

We're back in the land of tiny measurements that make no overall difference.
The short answer...  I dont know