85million FEC errors
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- Re: 85million FEC errors
85million FEC errors
28-02-2010 4:11 PM
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s/n down :10.5dB
attenuation 57dB
about the same as BT last year. ANy suggestions or am i stuffed with poor line?
3km from rochdale exchange.
Re: 85million FEC errors
28-02-2010 4:16 PM
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Re: 85million FEC errors
28-02-2010 4:28 PM
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adie:quote
Re: 85million FEC errors
28-02-2010 4:36 PM
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I am about 4 Km from my exchange and I am getting between 1.2 AND1.4 meg speed... My Download attenuation is 63.5db and my current SNR is 4.8 varying between 6.5 and 3.5 during a 24 hour period..... I don`t worry about the FEC figures... My line is supposed to support 2 megs maximum.... my current synch speed is 1952kbps... it has been up to 2016 kbps but my speed has never been above 1.6megs
Re: 85million FEC errors
28-02-2010 5:09 PM
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Re: 85million FEC errors
28-02-2010 5:14 PM
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Re: 85million FEC errors
28-02-2010 6:33 PM
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Quote Uptime: 8 days, 1:23:06
Modulation: G.992.3 annex A
Bandwidth (Up/Down) [kbps/kbps]: 959 / 3.069
Data Transferred (Sent/Received) [MB/GB]: 377,23 / 1,32
Output Power (Up/Down) [dBm]: 12,5 / 0,0
Line Attenuation (Up/Down) [dB]: 27,5 / 48,5
SN Margin (Up/Down) [dB]: 5,5 / 4,0
Vendor ID (Local/Remote): TMMB / IFTN
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 6 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 54 / 0
FEC Errors (Up/Down): 0 / 2.246.948.819
Re: 85million FEC errors
28-02-2010 10:39 PM
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Quote Uptime: 8 days, 1:23:06
Error Seconds (Local/Remote): 54 / 0
FEC Errors (Up/Down): 0 / 2.246.948.819
But, but, but...
If those '.' are meant to be ',', then you're running at 3200 FEC errors per second.
I'm not convinced it would be working at all with that kind of rate!
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: 85million FEC errors
28-02-2010 10:54 PM
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Quote from: lh router reports 85million FEC errors in 6 days.
That's 163 per second, which sounds quite a lot - but of course FEC errors are the ones that are correctable.
How does the CRC figure look?
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: 85million FEC errors
01-03-2010 9:06 PM
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CRC Errors (Up/Down): 46 / 1,669
HEC Errors (Up/Down): 38 / 1,209
that number of errors suggests something amiss, but i cant say i see any problem browsing
Re: 85million FEC errors
02-03-2010 11:30 AM
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I recently went to non-interleaved, but on a rather better line. I went from 30 FEC per hour (and almost no CRC) to roughly 30 CRC per hour. My errors are very sparse, so each error that was correctable with FEC became a full CRC error without.
If your errors are spread out a lot, then the 85 million FEC errors could become 85 million CRC errors; if the errors occur in dense bursts, then this could reduce to, at best, 1.25 million CRC errors.
Over the 6 days, that would be a theoretical range of between 2 and 164 CRC per second.
However, the way the data is carried on the line means that 60 CRC errors per second is 100% failure, so you can't get higher than that. At the very best, you will be guaranteeing yourself (2/60) errors, or 3.3%, but probably rather higher.
In this case, I'd say the the FEC correction is doing its job extremely well. I would only turn it off if I was in a very experimental mood, and willing to accept that it might make the line unusable for at least a day, and then have a knock-on effect on the IP profile even after it was turned back on again.
And, unfortunately, turning interleaving off also turns off FEC.
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: 85million FEC errors
02-03-2010 5:33 PM
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i can live with it until fibre arrives or i move house.
thanks for all the feedback.
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