Line stats and figures, good/bad, what does it mean ( error seconds etc etc)
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Line stats and figures, good/bad, what does it mean ( error seconds etc etc)
28-10-2016 3:20 PM
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I've got a moderate understanding of things such as Atenuation, attainable rate and actual speed, however when ive tried to find an explanation of things such as error seconds and if a certain figure is "good" or "bad" i hit a brick wall
These are my line stats from a Billion Bipac 8800nl r2 router on plusnets ADSL2+ service, any comments
Mode | ADSL_2plus | |
Traffic Type | ATM | |
Status | Up | |
Link Power State | L0 | |
Downstream | Upstream | |
Line Coding (Trellis) | On | On |
SNR Margin (dB) | 0.8 | 6.1 |
Attenuation (dB) | 24.5 | 13.7 |
Output Power (dBm) | 0.0 | 12.4 |
Attainable Rate (Kbps) | 17908 | 1220 |
Rate (Kbps) | 17523 | 1211 |
MSGc (# of bytes in overhead channel message) | 51 | 12 |
B (# of bytes in Mux Data Frame) | 207 | 37 |
M (# of Mux Data Frames in FEC Data Frame) | 1 | 1 |
T (Mux Data Frames over sync bytes) | 3 | 4 |
R (# of check bytes in FEC Data Frame) | 0 | 0 |
S (ratio of FEC over PMD Data Frame length) | 0.3792 | 0.9967 |
L (# of bits in PMD Data Frame) | 4388 | 305 |
D (interleaver depth) | 1 | 1 |
Delay (msec) | 0 | 0 |
INP (DMT symbol) | 0.00 | 0.00 |
Super Frames | 0 | 0 |
Super Frame Errors | 152243 | 3616 |
RS Words | 0 | 1106664 |
RS Correctable Errors | 0 | 0 |
RS Uncorrectable Errors | 0 | 0 |
HEC Errors | 345032 | 5325 |
OCD Errors | 2588 | 0 |
LCD Errors | 2588 | 0 |
Total Cells | 346936904 | 3877573183 |
Data Cells | 2656809202 | 109955709 |
Bit Errors | 4699150 | 86203 |
Total ES | 98036 | 2075 |
Total SES | 364 | 0 |
Total UAS | 264 | 264 |
ADSL BER Test -- Result | |
The ADSL BER test completed successfully. | |
Test Time | 60 seconds |
Total Transferred Bits | 0x0000000038C16180 |
Error Ratio | 0.00e+00 |
Re: Line stats and figures, good/bad, what does it mean ( error seconds etc etc)
28-10-2016 3:28 PM
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The only thing which really stands out is the downstream noise margin which implies a default noise margin of 3dB and is probably the reason for the high error seconds
You could try installing DSL Stats http://forum.kitz.co.uk/index.php/topic,17593.0.html and look at the error rates and noise margin changes
Re: Line stats and figures, good/bad, what does it mean ( error seconds etc etc)
28-10-2016 4:45 PM
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Error seconds is the main measure by which the DLM decides to make (or not make) adjustments to the line parameters to try to stabilise the connection at the best possible speed.
Although the number showing on your connection is very high, there is also the uptime those ES were accumulated over to consider, especially if your router is one of those which doesn't reset the ES count on a resync (as distinct from a reboot, which would reset the ES count.)
You haven't said whether you are actually experiencing poor throughput or dropouts on your connection - you could make a case for leaving everything as it is if it seems to be performing well.
Because the DLM seems to insist on a 3dB target SNRM on my connection despite a 5dB D/S SNR drop every evening after dark (search me ) I manually resynched after dark 18 days ago and now have a 8-9dB SNRM during daylight hours, and 3-4 after dark, which means the connection is currently stable, albeit with a slightly lower sync speed.
If you are worried about your ES count you could try an after-dark resync to try to increase the SNR headroom it is operating with if you don't mind sacrificing a bit of speed (not much point doing that if you know your last resync was actually after dark though!)
Re: Line stats and figures, good/bad, what does it mean ( error seconds etc etc)
29-10-2016 3:25 PM
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- Re: Line stats and figures, good/bad, what does it...