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132 posts

Master Geek


# 109479 20-Sep-2012 14:02
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About a week ago, my rock solid 12Mbps/1Mbps NDSL connection goes down. Gale force wind and rain at the time could have started the problem although we get plenty of that in Welly.

After that frequent disconnections (not only PPP but DSL) and variable sync speeds generally down to 2Mbps/0.5Mps. Some days cannot connect at all (windy days it seems but not sure about that), other (calm days) connect variably.

Slingshot tried interleaving on the line to no avail... connection seems more stable the last couple days (no wind... coincidence?) but still at ridiculously low sync speeds.

Tried my backup modem, same problems, troubleshooting using different cables and connection points throughout the house, no joy. Slingshot sends out a contractor who refers only to DSL led on modem... no POTS testing, noise, attenuation ... and puts a new cable from house to street after he discovers a bit of a swinging cable. Don't even think he bothered to check the outdoor connection box for leaks, just lays his cable. Connection still syncing at 2Mps but the DSL led is on and he says he doesn't know anything about sync speeds.

Now:

Statistics                 Downstream/Upstream
Line Rate                 2286 Kbps / 509 Kbps
Attainable Line Rate  3440 Kbps / 446 Kbps
Noise Margin             12.3 dB 10.2 dB
Line Attenuation        24.5 dB / 30.0 dB
Output Power            17.9 dBm / 12.6 dBm

What next? Would another interleaving session sort out the line rate if the street wiring was the problem(doesn't make sense but...)? Is there any way of bypassing the internal wiring for a test .... trying out a makeshift ADSL splitter or something?
(is there an illustrated guide for that somewhere?)

Thanks in advance for the geekish wisdom.


p.s. the first time i got NDSL installed at a property a guy was sent out to do something, i think to the splitter. At this place where i moved in 9 months ago, they didn't send anyone out to the house. Policy change?

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4244 posts

Uber Geek


  # 688890 20-Sep-2012 15:16
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At 24.5db I would expect to see at 15-16Mbps. Definitely a wiring issue of some sort. If Chorus replaced your overhead lead then that has been ruled out but it could just as easily be the cable pair in the street.
You need to get a splitter installed to rule out your internal wiring. Or cut off ALL stubs in the wiring so there is a clean pair from where the line comes in to the modem.



132 posts

Master Geek


  # 688922 20-Sep-2012 16:12
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thanks, pity the telecom splitter box is outside on the roof, will have to go up and temporarily disconnect the lines to other jacks in the house, identifying the right line will be fun with Naked dsl... (and at least 4 phone jacks in house)

i suppose that instead i could just temporarily disconnect them all and connect a cat5e cable plugged into my modem, read off the line sync stats and compare? would just need to connect yellow and black from splitter to cat5e?

 
 
 
 


4244 posts

Uber Geek


  # 688924 20-Sep-2012 16:20
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Yea you could just run a temp cable from the drop lead to the modem. If it is a new cable it will have white/blue if it is older it will be yellow/black.



132 posts

Master Geek


  # 688974 20-Sep-2012 17:33
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ha ha i'll have to get something to get through the old telecom triangular screws first... will have to go shopping ... mitre 10 or some electrical supplier i suppose.

at least i could see that of the three cables coming out of the master split box, two were pretty shabby looking, and all three are exposed to the weather (over 10cm for one and over 15m for another!!)

4244 posts

Uber Geek


  # 688985 20-Sep-2012 17:44
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A flat head will get the tri-wing screws off. Just get an appropriate size and apply pressure while un-doing.



132 posts

Master Geek


  # 689115 20-Sep-2012 21:18
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yeah i had a go with the little i had but one flathead too big and the other one too small. bashturds with their silly "screw-yous!"



132 posts

Master Geek


  # 689899 22-Sep-2012 15:53
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well had a look with my modem hooked up to street pair at the splitter, still 2Mbps only. thanks for advice.

to my surprise slingshot were good and sent out a "speed technician" who turned out to be exactly the same guy as before. but he only gets paid for each job not on time spent so i can't blame him for sorting it out the first time, just for his white lie that he didn't know anything about sync speeds. turned out a connection on the pole across the street was dodgy after a few too many contractors had spoiled the broth.

honestly this country and all of its infrastructure is slowly going down the tubes with its privatisation of natural monopolies, each company doing its own crappy halfassed job and trying to put the blame on each other... and third world employment law that enables all of 'em to use and abuse contractors (and the insecure lifestyle that goes with it) rather than employing people. this guy said it was his last week before he goes to permanent employment in some office job, wife couldn't take stress when no work on offer. he said he'll leave it to the immigrants who don't seem to mind as much - probably because they've just escaped worse situations in said "third world"! Hurray for the Race to the Bottom!!! (rant end).

 
 
 
 




132 posts

Master Geek


  # 689903 22-Sep-2012 16:00
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p.s. speed at the street pair was 12Mbps. speed in the house is 12Mbps.

Conclusion - the cabling looks old and dodgy (especially the old "braided strands of copper" wire feeding the house) but don't be too quick to blame it all on internal wiring (as in the sticky in this section of forum). Chances are problem is out on the street!

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Uber Geek

Trusted

  # 690048 22-Sep-2012 23:14
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Chances are the problem can always be internal if it hasn't been isolated and anyone who gets a chorus contractor out without being sure can be liable for the no-fault-found fee, and fair enough too.

In this case it sounds like wiring that was put in by a government department and inherited by Telecom. Lucky that Chorus is now properly independent so they can get on with the job of eliminating all the copper street wiring!




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^



132 posts

Master Geek


  # 690063 23-Sep-2012 00:44
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nah the copper was the first "internal" wiring pair ... and working well

street wiring was recent and dodgily connected said the contractor hisself.

contractors come, contractors go, and no-one takes responsibility for long term viability of infrastructure

4244 posts

Uber Geek


  # 690108 23-Sep-2012 11:41
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giollarnat:

contractors come, contractors go, and no-one takes responsibility for long term viability of infrastructure


Too right!! Over the years Telecom (and nwow Chorus) bought the price per job lower and lower so that now all the contractors get paid only for a slap and dash job. It also doesnt help that Chorus care more about paper work than they do they finished job. We get pulled up for not putting the right date on dockets rather than how good the quality of a job might be. I only do the work when I have to now but I am glad I could stop not long after it became Chorus rather than Telecom.

19282 posts

Uber Geek
Inactive user


  # 690111 23-Sep-2012 11:54
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Of course you should be pulled up if you are not using the correct date! I have no idea why you are complaining about this,

I have dealt with Chorus / vision stream a number of times in the last few months and they have been fantastic

4244 posts

Uber Geek


  # 690185 23-Sep-2012 16:11
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johnr: Of course you should be pulled up if you are not using the correct date! I have no idea why you are complaining about this,

I have dealt with Chorus / vision stream a number of times in the last few months and they have been fantastic


The point is the 'quality assurance' team care more about dotting the i's and crossing t's than the quality of work that is going on in the network. Maybe the date thing is a bad example but it is those sort of petty things that they care about rather than the quality of an underground joint for example.
And I am sure they will bend over backwards for people who are paying them but they are making it harder and harder for the people they have to pay.

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