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239 posts

Master Geek

#113238 10-Jan-2013 15:23
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I've been having high CRC errors (in the thousands per hour) on my naked DSL line.
Home wiring is clean from the demarc - lead-in, scotchloc to cat5e directly to new BT jack, to modem.  Nothing else on the line.

I decided to take a look in the mushroom and found my line joined by twisting wires together and then slipping over some sort of greased filled plastic sheath.
Is this the old school way of doing things?

I was going to scotchloc this but what also confused me was that there were three wires twisted together in each join... ie.  two yellow wires from the road, twisted together with my yellow wire then two grey wires from the road twisted together with my black wire.

How does this work?

I would also really love to have a chorus guy re punch my pair at the exchange as my problems only started when the exchange was upgraded to adsl2+ so there may be a dodgey connection in there somewhere.

I see a chorus guy lives down the road and i've contemplated knocking on his door and asking if he would do a quick job for me for beer or cash!

Any Chorus people on here from Palmerston North that would be interested in taking a look for me?

I've tried the ISP but the response is that the broadband is working ok so there's no fault... which is fair enough but as I know there's a problem, albeit a small one, I like to fix things.  Must be a side effect of my job working in IT.


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19282 posts

Uber Geek
Inactive user

  #742867 10-Jan-2013 15:34
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Who is your ISP?

239 posts

Master Geek

  #742870 10-Jan-2013 15:37
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Vodafone John.



4380 posts

Uber Geek


  #742889 10-Jan-2013 16:12
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Yup there are probably millions of those types of joints around. However, the pair you have shown is not the one going to your property by the looks of it - or maybe it just doesn't look like it. Pairs need to have the grid end cut off as the left over wire is a massive stub causing degraded performance.
I am in Palmy and would happily take a look. PM me your details and I could even cruise by this evening.

306 posts

Ultimate Geek

  #742897 10-Jan-2013 16:30
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Yer thats not your pair thats going to your house (it wouldnt be in a 3way joint or multiple) your pair connected it will be connected to one of the black 049 or lead in cables going to your house

ps pretty sure you shouldnt be in there if you dont know what your doing

7327 posts

Uber Geek


  #742899 10-Jan-2013 16:36
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Definitely sounds like there is a bridge tap there, sounds like it will be sorted pretty soon.


239 posts

Master Geek

  #742906 10-Jan-2013 16:49
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Thanks everyone.

Yeah i'm fairly certain that's my pair.. it's connected to 4 pair lead-in which is what i have and the only other lead-in in the pillar is a 2 pair.

don't worry... i was only having a little looksie!


19282 posts

Uber Geek
Inactive user

  #742946 10-Jan-2013 17:42
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PM me your Vodafone user name


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Uber Geek


  #742956 10-Jan-2013 18:02
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Cbfd: Yer thats not your pair thats going to your house (it wouldnt be in a 3way joint or multiple) your pair connected it will be connected to one of the black 049 or lead in cables going to your house

ps pretty sure you shouldnt be in there if you dont know what your doing

It is fairly common that the grid end hasn't been removed. Didn't matter when it was just POTS and the joints just stay like that until someone actually notices an issue.

Watch for an update tomorrow...

833 posts

Ultimate Geek

  #743061 10-Jan-2013 21:59
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Just a word of warning

Unless you are authorised by the network owner (in this case Chorus)

Just by opening the plinth (the gray terminal) you open yourself to being charged for any damage (unintentional or not) or the service charges for the restoration of service to yours or any of your neighbours circuits, up to being prosecuted for interfering with a telecommunication service.

Even though there being serveral Chorus authorised Service Techs contributing to geekzone they are only allowed to restore a neighbours line without a work request (the good neighbour thing) but generaly unless they have been sent a request, via a provider, from Chorus to work on the network, they are open to the same conditions as above and more likely they may loose their accrediton (and their job) if found out.

and before anyone starts in on me im not narking on anyone!


In the mean time back to why there would be a three way joint - originaly all service lines in RLG systems (the cable loops feed throught the grey plinths) where connected so that the circuits continued all the way to the end of the cable loop (grid end), this was so that theoreticaly they maintained balance between all pairs along the cables length - in the 80s this practice was found to be unnessessary (and now can and does cause refective errors in dsl) - so as circuits have been worked on progressively over time they are changed to a straight connection - now by a flying lead from the cable pair to the service lead to the house. If your DSL connection was installed over an working POTS line then likely it hasnt been touched (unless it caused errors when originaly connected)

Your first point of call is always your provider.

1990 posts

Uber Geek


  #744317 13-Jan-2013 22:58
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The ISP should be able to request Chorus investigate data errors, and should request it to be escalated to a senior faults rep if the first fault ticket gets knocked back.

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

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