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  # 821671 18-May-2013 18:08
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just signed up for snap vdsl2

current adsl2 line attenuation is 9db so hopefully I get ok sync rate on vdsl2



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  # 821691 18-May-2013 18:54
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You'll likely see 3-5db of additional attenuation going from ADSL to VDSL, but we have people in this thread who are getting pretty decent speeds out of lines with those kinds of figures.

How's your internal wiring?

 
 
 
 


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  # 821699 18-May-2013 19:13
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cyril came over, removed the old adsl2 filter and retwisted pairs

it's going to a single jack point



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  # 821708 18-May-2013 19:24
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Sweet. So 9db after all the wiring fixes?

When you say 're-twisted' are you talking about joining wires together?

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  # 821709 18-May-2013 19:26
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JamesL: cyril came over, removed the old adsl2 filter and retwisted pairs

it's going to a single jack point


So incoming line straight to one jackpoint and nothing else in the equation?  Should be good to go then; let us know how it looks when you're connected.  I think mine was around 9 or 10 db on ADSL.  Now 13 on VDSL and I can't complain about the speeds! 

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  # 821753 18-May-2013 21:17
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Straight to one jackpoint only, nothing else

It was 9db before he came, but he clipped and existing scotch locks and put new ones on. We didn't expect any difference from the exercise but it didn't hurt just to make sure.

I can't remember the term he used but the cable is twisted, when people connect the pair they untwist it, so he just made sure they were ok

I was going to get cat5e run but the cable already running from the etp is higher grade which I wasn't aware of

I'm only 500m away from the cabinet, no idea on line length, so bit disappointed with 9db but oh well. One thing I'd like to try is a new cable run from the plinth to the ETP but not sure that'd make much difference

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  # 821788 18-May-2013 22:44
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Damager: Ripped a couple of videos off YouTube and it was downloading at a consistent 4 to 5MB/s. Is it coming from the local cache?


Could have been, but I've seen 100+mbit/sec from certain Australian hosts on Snap's network. (Hint: I am responsible for performance metrics at Snap :)




“I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything.” - Nikola Tesla

 


Disclaimer: Views expressed in my posts do not necessarily reflect those views of my employer.

 
 
 
 




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  # 821796 18-May-2013 23:26
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@JamesL: Ok, sounds like you've had a top notch job done there! Not much else you can do but wait and see how it goes when your VDSL is hooked up! Should you find the connect speeds less than you were hoping for, we're gathering quite a bit of collective knowledge on SNRM tweaking around here, so I'm sure we can assist with that if you're interested! :)

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  # 821800 18-May-2013 23:52
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I'm not sure what SNR tweaking capability the zylex p870h has, anyone that has one know?

I opted for the zylex so that I could bridge it with my existing router

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  # 822679 20-May-2013 21:11
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As per my previous I pushed my SNRM Tweak up to -70. This seemed stable so I thought what the hell I'll just try straight to -80...  this didn't go so well:





That was after roughly 40 minutes and while it didn't seem to cause any issues in that time,  I decided it was pushing it a bit too much! So I pulled back to -75.  This seems to be going OK so far, though it's getting might close to 10 CRCPM... :)





Date          SNRM Tweak    SNRM Actual    Sync    CRCPM
20120925    +20                14                33.9      0.06
20121006    +10                13                34.2      0.08 
20121211    -30                  9                39.8       0.31
20121215    -40                  8                40.9       ~1
20130502    -50                  7                41.6       ~1.3
20130503    -60                  6                43          2.82
20130510     -60                 6                43          3.05
20130511     -65                 5                43.8       4.68 
20130518    -70                5                44.4       6.6
20130520    -75                3                44.9       9.51






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  # 822684 20-May-2013 21:14
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Hmm, -75 seems to be your practical limit by the looks! Keep a close eye on that CRCPM tho, it could go up still!

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  # 822685 20-May-2013 21:18
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I changed it yesterday lunchtime, so hopefully it's had a bit of time to settle. But yeah I'm keeping a close eye on it. ;-)

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  # 822690 20-May-2013 21:34
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ARGH i lost DLM-1 :(



Minimum 25ms to anywhere now, doubles latency to auckland. Lame. It looks like my DSL got me kicked off at 4am this morning. I guess i can drop SNR and hope it swaps me back? Anything else i can change?

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  # 822692 20-May-2013 21:40
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stevehodge:
networkn: Feeling frustrated. I was with an ISP for 2 years, I got a connect rate and throughput equal to 69993 (Was always this and never changed), I was assured that a change of ISP would have no bearing of my speed and that even if it did DLM would bring me back to the profile I was on before of 17a, and this has not happened. Now the new ISP is basically blaming my line despite that it had been perfectly stable at 70Mbps prior to the change over. I wouldn't have changed if I knew I would lose the speed. i am syncing now at around 44Mbps and it's SLOWLY climbed to 44Mbps from 42Mbps which it was originally.

It's only been 2 weeks, right? I think you're going to have to be more patient. It's taken people more than a month just to get to DLM-1 before, let alone a switch to 17a.

What is it that you're doing that makes the difference between 44 Mbps and 70 Mbps so painful?


Well nearly 4 weeks nothing has improved more than about 1Mbit. 

Well it's not really the point of what I am using the bandwidth for (Very large backups), it's the fact it was 70Mbit for 2 years, the ISP who took me over ASSURED me I would get back to my normal rate or they would escalate  now they are telling me they can't do anything. Not impressed. Essentially a 30% drop in speed. 



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  # 822693 20-May-2013 21:41
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@sidefx: Oh, ok, that's not so bad then. Still, you're pretty close to the wire (by our estimation anyway!).

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