High upload SNR

[#1]

Hi,
For year my down and up SNR have been about 60 (X 0.1db) on the Draytek. Recently (sometime in the last few months) the up SNR is now more like 120. The down is still 58.
Any ideas? Nothing has changed that I know of.
Thanks.

[#2]

which product are you on and what are the full stats

[#3]

Plus.net FTTC fibre unlimited 80/20.
From the Draytek router:
VDSL Information      (VDSL Firmware Version:   1414c3 )
 Profile State UP Speed Down Speed SNR Upstream SNR Downstream
 17a Showtime 19998 (Kbps) 68489 (Kbps) 144 (0.1dB) 56 (0.1dB)

[#4]

So basically your line has perhaps improved or perhaps G.INP has been added to the upstream or I have no idea 

[#5]

Honestly I wouldn't worry about it, it's not causing any impact on your sync speeds.

[#6]

Fair point. Thanks guys. Is a higher figure better then?

[#7]

it is when you have hit the speed limit for the product

[#8]

So because I'm at 20meg up and thus hit the limit the SNR goes up?  If so, that explains everything. If only the down SNR would go up as well by hitting the limit!!
The router tells me the attainable up rate is 24 meg but the product is capped at 20.

[#9]

Quote from: slime

So because I'm at 20meg up and thus hit the limit the SNR goes up?

Yes, because VDSL2 is adaptive and has a target SNR margin (usually 6dB). So the rate you get is usually determined by that 6dB SNR margin. Since you have such a good upload speed and are already at the maximum rate for the product, there is no need to have a target 6dB. That 14.4dB SNR margin you have shows there is lots of SNR margin to spare (if that makes sense). It is a really good position to be in.
As to why it has increased, as the other posters have said, it could be any number of reasons, including G.Inp being applied on the line (although I don't think that alone would account for such an increase), changes to your internal wiring, changes to the wiring between the cabinet and your property etc.

[#10]

Thanks for the great explanation