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[knewt]

Hi

Just disconnected my ISP Router as once more they rolled out a firmware update and my ping is again affected, usually this is fixed with a rollback but this time this did not work.
To prove me right I have reinstated an older Billion router I was using before and voila' ping is back to pretty much what it was
I am just curious as now with the older router I can see all the stats and there is a lot of error down where it says correctable errors.
According to Cabinet lookup page, I should be around 1.3Km away from Cabinet
Are these stats okay considering the distance?


xDSL
xDSL
Mode   VDSL2
Traffic Type   PTM
Status   Up
Link Power State   L0
Downstream   Upstream
Line Coding (Trellis)   On   On
SNR Margin (dB)   6.0   6.3
Attenuation (dB)   25.8   0.0
Output Power (dBm)   11.4   2.0
Attainable Rate (Kbps)   42542   7292
Rate (Kbps)   39999   7292
B (# of bytes in Mux Data Frame)   162   207
M (# of Mux Data Frames in an RS codeword)   1   1
T (# of Mux Data Frames in an OH sub-frame)   0   40
R (# of redundancy bytes in the RS codeword)   8   8
S (# of data symbols over which the RS code word spans)   0.1295   0.9057
L (# of bits transmitted in each data symbol)   10564   1908
D (interleaver depth)   4   1
I (interleaver block size in bytes)   171   108
N (RS codeword size)   171   216
Delay (msec)   0   0
INP (DMT symbol)   55.00   0.00
OH Frames   0   0
OH Frame Errors   2   3
RS Words   101967464   1755069
RS Correctable Errors   167143   4
RS Uncorrectable Errors   0   0
HEC Errors   0   0
OCD Errors   0   0
LCD Errors   0   0
Total Cells   254974047   0
Data Cells   3559929   0
Bit Errors   0   0
Total ES   1   2
Total SES   0   0
Total UAS   29   29


Performing a BER Test this is the result:

ADSL BER Test -- Result
The ADSL BER test completed successfully.
Test Time   20 seconds
Total Transferred Bits   0x000000002B2F3300
Error Ratio   0.00e+00

Thanks for your help

[j0hn]

Codelook gives the distance to the exchange, not the cabinet. It's cabinet locations are way off on many cases anyway.
If you really were 1.3km from the cabinet then your sync speed would be extremely high for that distance. The line is likely a bit shorter than that.

Correctable errors (FEC) are errors that never happened. They were fixed/corrected.
My line ticked along at a steady 10,000 FEC per minute for many months, if not years. During times with a noisy line it could be 100,000+ FEC per minute with no issues.
In short, they aren't an issue.

You're hitting the maximum 40Mb down that your ISP has provisioned your line at.

[knewt]

Just seen your reply now, I thought I 'd received an email but I was here to double check on the stats I have provided and read as I read a bit more on various stats meaning I was wondering
 whether on Output Power, would it be normal that DL and UP values are not even slightly equal? Just wondering as why the DL is around 12 dBm where upload is so down to 2 dBm, is this related to the actual ?

Interestingly about the actual rate as you mentioned, although the actual rate as always shown around 39/40 Mbps the actual speed I am downloading has never been over 35-36Mbps

Is there a separate test that I can see where my cabinet is other than the exchange? Is 1.3 Km from the exchange too far in general?

Thanks

[Alex Atkin UK]

Download and upload are different frequencies, also download is from the DSLAM (which is going to have clearer picture of overall line characteristics) and upload is from your modem (which is fairly dumb).

Plus its going to be an average across all the frequency range so not give a very clear picture.

Whatever the exact reasons it is absolutely normal for upload to be much lower:

[tubaman]

...
Interestingly about the actual rate as you mentioned, although the actual rate as always shown around 39/40 Mbps the actual speed I am downloading has never been over 35-36Mbps
...

The rate shown by your modem is the sync rate not the data rate, which for downloads will a maximum of either about 96% or 92% of the sync rate due to overheads and whether G.INP is running in Re-transmission (Rtx) Low or Rtx High mode. Rtx High would be more usual I believe.

[knewt]

I had to change router as I said I was having latency issues with the Talktalk one, the stats I have uploaded are from my previous Bipac 8800NL and now I connected a TP-Link VR600V2 but some stats are worringly lower like output power was 2.0 on the Bipac where on the TP-Link is lower and is supposed to be a better device.

Bipac
Output Power (dBm)   11.4   2.0

TP-Link
upstreamPower=16
downstreamPower=114

[g3uiss]

Has that affected the sync rate ?

[knewt]

No, same pretty much.

[tubaman]

Each modem is a bit different and as all you appear to have is a 0.4dB change on the upstream side I'd personally just ignore it if the sync rates are fine.

[knewt]

Thanks tubaman, generally speaking what should it be considering the overall stats?

[tubaman]

Thanks tubaman, generally speaking what should it be considering the overall stats?

I don't actually know as it's not a stat that is generally worried about. As long as the sync rate is where it should be and the ES and SES errors aren't clocking up too fast then I'd just ignore it.

[g3uiss]

I would be happy with those stats. Indecently the router won’t change the latency you likely go a different routing.