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567 posts

Ultimate Geek
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  # 661817 25-Jul-2012 15:38
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Would installing a master filter increase the sync rate when the house only has one jackpoint?

Just wondering if I should get it done




1429 posts

Uber Geek
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  # 662008 25-Jul-2012 20:31
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If that jackpoint is the only jackpoint connected in the entire house and the line effectively comes in from the demark point directly to that one socket then a splitter will not help.

 
 
 
 


43 posts

Geek
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  # 662400 26-Jul-2012 14:14
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Just wanting to confirm you guys are determining the DLM setting you are on by observing the ‘Latency’ and ‘INP’ figures and using that “mini-table” on page 1 of this forum topic?

My lead-in cable runs along a fence from the street to my house, I'm quite keen to replace it with some Gel-Filled Cat5e.  I also don't have an ETP (well, a box anyway).  Old houses aye, gotta love em, lol.  My ADSL2+ sync to the cabinet was really good, so I'm going to have to do some investigating why VDSL is failing to impress me.

Will follow-up with some current statistics tonight.


JASON
New Plymouth

5 posts

Wannabe Geek


  # 662463 26-Jul-2012 15:49
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@Skymax: I've had VDSL2 for a few weeks now, and while the upload speed feels first world, it failed to impress me for gaming ping. Was getting 20ms - 40ms for the first few weeks (to closest speed test services), it stabilised at 20ms last week (after some snap issues), then suddenly down to 5ms - 6ms this week (which makes gaming on Sydney servers much better). So it _may_ improve over time.



I thought DLM had notched me down onto a better profile, but according to snap my DLM profile has never changed (still on EUBAV-VDSL2-1, but I'm unsure what that means). My Fritz!box shows 1ms latency, and I'm presuming I'm on the 8db DLM profile. I haven't done any tweaking as yet.

Essentially I've shaved 15ms ping off the previous best. Can anyone shed some light on the reason behind it if it wasn't a DLM profile change?

43 posts

Geek
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  # 662564 26-Jul-2012 19:00
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Looks like I am:
DLM-6     8ms  2INP

The speed has improved since lunchtime, so that's great  :-)

Upper frequencies are well down though  :-(






What speedtest site do you guys use?


-JASON-

PS: This is my first post with pictures, so hopefully it works.

43 posts

Geek
+1 received by user: 2


  # 662719 27-Jul-2012 06:36
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The morning after the install (06:30am):



-JASON-

567 posts

Ultimate Geek
+1 received by user: 122


  # 663086 27-Jul-2012 20:07
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SamF: If that jackpoint is the only jackpoint connected in the entire house and the line effectively comes in from the demark point directly to that one socket then a splitter will not help.


Thanks for that, was just wondering as I seem to get a high number of errors, is this normal?



Iam still in the first 10 day period of having VDSL


 
 
 
 




1429 posts

Uber Geek
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  # 663140 27-Jul-2012 21:59
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The errors you need to worry about are the CRC errors, which don't seem too high to me. The FEC errors are correctable and not counted for the purposes of DLM tuning.



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  # 663500 29-Jul-2012 09:44
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Well... it's been 9 days and I haven't had a DLM change. I'm currently stuck on DLM-4 with 0.23 CRC errors per minute (might be less, it seems to have been stuck on this figure for some time - no CRC errors in the last 15min) and an ES figure of 785.

I was expecting a DLM change before now, but maybe DLM has decided that there are no better profiles to switch to?

202 posts

Master Geek


  # 663503 29-Jul-2012 09:52
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What is your line uptime?



1429 posts

Uber Geek
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  # 663510 29-Jul-2012 10:13
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Also 9 days.

202 posts

Master Geek


  # 663516 29-Jul-2012 10:29
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What caused DLM to change you off DLM 1 in the first place? Did you have some re-syncs?



1429 posts

Uber Geek
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  # 663519 29-Jul-2012 10:32
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I'm not sure tbh, I certainly didn't initiate any resyncs.

202 posts

Master Geek


  # 663521 29-Jul-2012 10:38
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Notice any unusual SNR fluctuation in the Statistics? Iv seen mine go as low as -2 dB SNRM. Sometimes this causes a re-sync and the line is back to normal.




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Uber Geek
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  # 663524 29-Jul-2012 10:47
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I haven't noticed any odd snr figures.

Just noticed these error stats tho:



Looks like I'm getting quite a few errors at times!

The annoying thing is that I got less errors when I was on DLM-1.  The sync rate was a bit lower tho which I think helped.  I guess the only way to lower the sync is to increase the target SNR tho right?

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