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58 posts

Master Geek


Topic # 110986 21-Oct-2012 22:33 Send private message

Hi Guys,

This is really a last resort, to pick your brains before contacting Chorus.

Basically, switched to NOW (formerly Airnet) on a Naked DSL plan, using our old-faithful Dynalink RTA1025W, and got a 4Mbps speed increase, and nice little 16ms ping to Auckland (previously 35+).

Purchased a Netgear DGN3500 for gigabit and Wireless N capability, all seemed ok.

Moved computers into a different area of the house, and had the closest jackpoint wired up as the primary DSL port.  DSL drop outs started, ping to Auckland raised permanently to 35ms+, can no longer stream 1080p without constant buffering pauses, and 40% of the time when surfing I am presented with "Page cannot be displayed" which is rectified and loads successfully after a retry.

Got some guys round to take the black cable, directly from the demark, underneath the house, directly into the closest jackpoint.  All other jackpoints disconnected.   Still dropping DSL ~10-15 times a day, and sometimes just PPP.

Figured it was the new DGN3500, so went back to the RTA1025W.  Nope, still dropping, but not as much as it was with the DGN3500.

I have tried:
- Upgrading firmware on the DGN3500.
- Tried with and without filters (multiple).
- Changed BT to Router telephone cable.
- Changed Ethernet cable from CAT5E to CAT6 from PC's to Router.
- Updated and tweaked network adapter settings.
- Established ideal MTU, and set accordingly in the routers.

Here's the interesting thing... sometimes even the RTA1025W router won't respond, and provide me with an "error 400. Bad Request. No request found", and I even get "Page can not be displayed" on the DGN3500 - just when browsing their web interfaces.

So many factors, so many variables, it's labor weekend and I'm doing my head in, so I appreciate any feedback about anything else I've missed, before I go calling in Chorus to check their network.

Edits:  Adding more information.  Our Noise Margin is 6.3dB down, 6.2 up.  Line Attenuation is 35dB down, 17.8dB up.

Getting a lot of Errors:  http://s12.postimage.org/zca0fnewt/stats.png



 

 

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  Reply # 704528 22-Oct-2012 08:06 Send private message

You can't contact Chorus directly. You have to contact your ISP who will contact Chorus.




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  Reply # 704535 22-Oct-2012 08:34 Send private message

You need to contact NOW and follow through with them.

There are a number of things - firstly your attenuation is high. Reastically anything above 30dB is going to deliver a sub standard internet performance. This could be due to distance from the exchange/cabinet or could be wiring related.

Secondly you're also probably on a ULL connection based on the noise margin. One can presume you aren't on a cabinet because if you are mid span injection will be screwing with your connection. If you are on a cabinet you'll need to get them to move you to a wholesale Chorus connection if you want better speeds. Unfortunaterly this isn't something anybody can tell you without knowing your address, but you can look at this yourself on the Chorus SAT map and tell us.



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Master Geek


  Reply # 704643 22-Oct-2012 14:34 Send private message

freitasm: You can't contact Chorus directly. You have to contact your ISP who will contact Chorus.

Ah yes, sorry, I should have rephrased my original post to say "Before getting Chorus involved".

sbiddle: You need to contact NOW and follow through with them.

There are a number of things - firstly your attenuation is high. Reastically anything above 30dB is going to deliver a sub standard internet performance. This could be due to distance from the exchange/cabinet or could be wiring related.

Secondly you're also probably on a ULL connection based on the noise margin. One can presume you aren't on a cabinet because if you are mid span injection will be screwing with your connection. If you are on a cabinet you'll need to get them to move you to a wholesale Chorus connection if you want better speeds. Unfortunaterly this isn't something anybody can tell you without knowing your address, but you can look at this yourself on the Chorus SAT map and tell us.


Thanks for your help, I will contact NOW and get them to get Chorus to investigate.
I've taken a look at the Sat map, and confirm I am in the HBN/Exchange ADSL2+ cabinet, but right on the outer rim of it.  Even so, these problems haven't existed over the past 2 years at this residence.

What's strange, is the DSL sync drops every hour, but there are no drop outs in the 3am - 8am hours.
I guess my best chance of resolution is to get Chorus to do their thing.

EDIT:  By ULL, you mean Naked BB?  Yes.  Is there some type of ISP/Network configuration that is optimal for these type of connections?

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  Reply # 704750 22-Oct-2012 19:56 Send private message

ull is where you are connected to equipment that is not choruses but stuff owned by the company you pay the bill to if so your connection may mot utilize the cabinet as shown in the SAT tool



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Master Geek


  Reply # 704806 22-Oct-2012 21:18 Send private message

johny99: ull is where you are connected to equipment that is not choruses but stuff owned by the company you pay the bill to if so your connection may mot utilize the cabinet as shown in the SAT tool


Ahhh thank you for the explanation.  In that case, this is what I have:
UCLL directly connected to NOW's equipment in the Hastings Exchange.
Having trouble working out why Chorus says I have an expected sync rate of < 10Mbps @ 30 dB attenuation, but I'm getting 15Mbps @ 32 dB.

Not that I'm complaining mind you - steady downloads @ 1.4Mbps.
They've turned interleaving back on now, to see if that makes a difference with the DSL Sync drops.  My ping has gone up to 49ms to Auckland, up from ~35ms, but doesn't look like I'll ever see that 19ms again.

The DSL drops are my main concern, as our telephone services are on VOIP also.

Will report back with what Chorus finds this week (hopefully).

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  Reply # 704865 23-Oct-2012 06:18 Send private message

If you're getting a higher sync rate now it'll be because NOW are running a 6dB SNR vs the 12dB Chorus runs. This offers higher speeds with a reduced capability to deal with interference or noisy lines.




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  Reply # 705171 23-Oct-2012 15:45 Send private message

sbiddle: If you're getting a higher sync rate now it'll be because NOW are running a 6dB SNR vs the 12dB Chorus runs. This offers higher speeds with a reduced capability to deal with interference or noisy lines.



Interesting.  That makes a lot of sense.

Here's the diagnosis:

As we are on the verge of the ADSL2 cabinet, our attenuation is sitting at 30dB, and for some reason (perhaps the warmer weather), our connection was no longer strong enough to hold the DSL Sync, thus dropping, and not being able to provide the 19ms ping I previously obtained.

The options were to:
- Turn interleaving back on, and make do with a 45-50ms ping.
- Reduce down to ADSL1 speeds and leave interleaving off.

I've kept with ADSL2+ with interleaving on.  Resolved, at least no more disconnects.

The warmer weather does sound plausible, as the DSL never lost sync between the 1am - 7am hours when the daytime heat had dissipated.

Thanks for your help all, and I hope this thread helps someone else should they experience a sudden change in performance.

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