Sync speeds have halved over time.

Forums › New Zealand Broadband › Sync speeds have halved over time.

MushroomsNZ

14 posts

Geek

#112494 11-Dec-2012 09:27

Hey guys, I can't remember any details from my old account so I've had to make a new one. Over time I've noticed a huge drop in dsl sync rates, going from 16Mbps down to 6-7Mbps. I never got round to figuring out what the problem was until now.

I'm on Telecom DSL, connected using a TP-Link TD-W8960N modem in Auckland. I'm approximately 300m away from the nearest cabinet. The modem is connected to the first jack into the house without the use of a filter. I've currently disconnected the other phones etc. because we've been having disconnection issues (any time someone rings, ADSL+PPP drop) and the line is crackly. I've tried different filters and cables to no avail.

Are there any other tests I can do myself? The phone issue seems to be separate from the low sync speed and I doubt chorus isn't going to rush to their feet to figure out why I'm only syncing at 6Mbps rather than 16Mbps.

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#730189 11-Dec-2012 09:32

Get a master filter/splitter installed first.

Given your attenuation, I'd expect the sync rate to be closer to what you used to have.

The fact the line drops, and there is voice interference as well suggests a physical wiring fault - the great majority of these are within the home, not outside, so installing a master splitter will isolate these problems.

If you're not confident DIY, then speak to Coffeebarron.

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johnr

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#730197 11-Dec-2012 09:41

As above Get a master filter/splitter installed first

MushroomsNZ

14 posts

Geek

#730270 11-Dec-2012 11:04

Okay, seems like the splitters have become a lot cheaper over time. Do you know of any handy install guides on Geekzone, or do I need to have a good search around?

This is how the house is currently wired.

This is the basic layout, all running off the same wire pair. A few years ago a Chorus tech cut a few wires in the demarc box that were unused. There are another 3 jack points in the house that are running on a different pair that has no dial tone. Off the top of my head, the dsl and phone are on a white/red pair, the non-functioning are blue/white and orange/brown.
By installing the splitter and running a dedicated Cat cable up to the office to a separate jack, would keep the other jacks on the red/white pair as the voice component?

johnr

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#730273 11-Dec-2012 11:10

Coffeebaron here on Geekzone is the master

RunningMan

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#730333 11-Dec-2012 12:08

Search box is your firend, but pretty easy to do with basic tools and reasonable experience. The most difficult part (and time consuming) is usually running the cables to where you want them, and working out the dogs breakfast of existing wiring (which you seem to have already done!).

Splitter about $30 from PBTech - can probably be installed in your demarc.

A few UY gel crimps, a length of CAT5 cable and your choice of outlet (RJ45 / BT etc.) completes the picture.

MushroomsNZ

14 posts

Geek

#730349 11-Dec-2012 12:21

Yeah I have a feeling running some cat5 from the ground floor up to the 1st floor isn't going to be the easiest. The house isn't on piles either so no crawl space underneath.

Our demarc point is only one of the small 10*10cm boxes. Once I figure out how to unscrew the triwing screws I'll see how much room is available inside, but I doubt it is much. How else could you mount the splitter?

RunningMan

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#730355 11-Dec-2012 12:26

Unless there is a massive rats nest of wires in the demarc, there would probably be enough room for the splitter - they aren't that big. It should really go there, as the idea is to bypass all the other internal wiring.

If it's a difficult cable run, contact Coffeebaron - he charges a very good price for GZ members.

MushroomsNZ

14 posts

Geek

#730421 11-Dec-2012 13:26

I've just had a look and have taken some photos.

The second phone line has been capped off any isn't in use. The #2 arrow points to a cable that terminates at a jack in the spare room. Obviously this jack won't work as it's not connected to anything.

#1 arrow points to the active line. The blue and white pair from the lead in is spliced to the red/white pair which has dsl+voice and does a bit of a mickey mouse winding its way around the house.

The blue/white pair has lost a bit of insulation as you can see from the next photo.

coffeebaron

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#730431 11-Dec-2012 13:39

You need to trace a spare pair from demarc to where you want the DSL jack-point. Green wires from master splitter go there, and new jack-point at other end.
As mentioned, I do a good price for Geekzone members if your are in Auckland or Waikato, so get in touch if you would like this done for you.

Cheers
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MushroomsNZ

14 posts

Geek

#730485 11-Dec-2012 14:29

I believe I should be able to do the install. It seems fairly logical provided I have the modem at the first jack point. Now that you mention running it on a spare wire pair it became much easier - not having to run extra wires.

In my head I see it as:

blue/white lead in -> Splitter Input
Splitter Voice Output -> Red/White Pair
Splitter ADSL Output -> Blue/Green Pair terminating at a dedicated RJ12 jack next to the first jack point

I'm fairly sure I understand the circuit in the house, but is there a good way to be sure (other than taking out the wires one by one and checking to see which jacks are still working?

Ragnor

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#730502 11-Dec-2012 14:46

If you really can not run a new seperate Cat5E or Cat6 from the demarc to where you want the modem then you are probably best served putting the splitter just before the first jack.

This is what you want to achieve:

MushroomsNZ

14 posts

Geek

#730504 11-Dec-2012 14:51

Where I want the modem is where the first jack is. I can look into running some new Cat but it does look like it'll cause a bit of a head ache (plastered exterior + going up a level).

Edit: From the looks of it, I'll need to redo the connectors at the demarc anyway, seeing as insulation isn't the greatest. If I can fit the splitter in there I'd rather do that than up at the first jack.

cyril7

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#730506 11-Dec-2012 14:55

Its normal practice to place the filter in the demarc, its was desiged to fit in those demarcs, the sholders of the filter fit around the screw hole mounts.

Your proposal to wire is correct, running a new cat5e from the demarc to the first jack will achieve little, the quality of the 1km or so of cable from the exchange is of similar performance.

Cyril

MushroomsNZ

14 posts

Geek

#730682 11-Dec-2012 17:44

Hmm so I've installed the splitter. The phone is working as it should but I can't seem to get the DSL signal.

At the splitter I've got green - > green and White - > blue. Doesn't seem to make a difference at the new BT jack where I connect the pair, I just don't get a connection.

coffeebaron

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#730720 11-Dec-2012 18:27

Many times cables don't go where you think they go. Random joins along the way etc.

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