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441 posts

Ultimate Geek

# 83569 18-May-2011 20:38
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Hi Xnet.

I have just been through the exercise of trying to resolve poor VOIP call quality and slow ping times. It appears that this has now been resolved by an upgrade of the backhaul. Thankyou to Maverick & Cameron from Xnet for the support on this forum.

This however is the third or forth time in two years that Telecom Wholsale have had to increase the backhaul to resolve what turned out to be congestion.

For the benefit of all, can someone from Xnet comment on the following general questions on ADSL backhaul  quality?

1.What quality obligations do Telecom Wholesale have for ADSL backhaul? I believe they only have to allow an average of 30kbps or 45kbps per customer?  are there obligations for latency, jitter, packet loss on the backhaul?

2.I believe that Telecom Wholsale have reporting obligations to the Commerce Commission and ISPs? Does this report identify congested DSLAMs? If this is correct, why are congestion issues not identified and resolved proactively before users have too many problems? 

3.Depending on which traceroute application I use, I get significantly different packet loss results. Which wxnz domain should I be testing to, which app do you recommend? (Previously it has been winmtr), and why do the packet loss results vary so much between winmtr and the other apps (, pingplotter, visualroute)?

4.At what point with Speed, latency, jitter, packetloss or MOS should a user be raising a fault ticket for investigation?

I hope you can enlighten us.

Regards Allen.


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28585 posts

Uber Geek

Biddle Corp
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  # 470763 18-May-2011 20:48
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Telecom's obligations for ADSL are set by the Commerce Commission who have dictated the makeup of wholesale products that Telecom Wholesale must offer to both Telecom retail and to other ISP's.

The 30kbps / 45kbps you talk about is average user handover dimensioning between the Telecom Wholesale network and your ISP. The maximum rate for dimensioning was 45kbps per user, but this has now increased considerably with some ISP's offering rates of ~100kbps per user (I believe WxC are offering this on their EUBA connections).

Unfortunately you won't get simple answers to your questions as there are a lot of different variables and complexities of the network. As ISP's migrate users to EUBA plans away from the old ATM network many of the constraints that existed will go.

441 posts

Ultimate Geek

  # 470773 18-May-2011 21:08
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sbiddle: ... (I believe WxC are offering this on their EUBA connections)....
... As ISP's migrate users to EUBA plans away from the old ATM network many of the constraints that existed will go.

Hi when I asked Xnet about EUBA and the ADSL2+ upgrade at my exchange in September Cameron said "By default your service will still be BUBA on ADSL2+,  we are currently investigating new EUBA plans as there is a price difference for these products."

Regards Allen. 


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Uber Geek


  # 471067 19-May-2011 13:01
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What area do you live in? What exchange/cabinet are you connected to?

I think Xnet only have ethernet handover in Auckland atm, so if you are outside of Auckland they may not be able to put on on EUBA yet because of the cost of regional Ethernet backhaul to their handover.

Speculation though, unless Xnet confirms.

441 posts

Ultimate Geek

  # 471251 19-May-2011 18:47
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Ragnor: ...if you are outside of Auckland they may not be able to put on on EUBA yet because of the cost of regional Ethernet backhaul to their handover.

New Plymouth Spotswood exchange SWO-DSLAM-01 due for ADSL2+ upgrade Sept 11.

That explains it. I saw mention in some forum postings about performance improvements on Xnet after being swapped to EUBA backhaul. Must have been Aucklanders. Oh well. 


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441 posts

Ultimate Geek

  # 472547 22-May-2011 18:56
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Ragnor: I think Xnet only have ethernet handover in Auckland atm, so if you are outside of Auckland they may not be able to put on EUBA yet because of the cost of regional Ethernet backhaul to their handover.

Xnet, can you comment on EUBA outside of Auckland as well? I am in Taranaki. You have said previously in a different thread that when my exchange (SWO) is upgraded to ADSL2+ that I will still be on BUBA by default. Does this mean that I will remain on the same congested backhaul as I currently am, and will still have the same congestion issues that I have historically had?

What improvements other than peak speeds will a customer outside of Auckland get from an ADSL2+ upgrade if they remain on BUBA?

I also read in a few places that telecom wholesale wern't doing BUBA on ADSL2+, but were putting customers on EUBA0?

Regards Allen.

334 posts

Ultimate Geek


  # 475702 30-May-2011 11:45
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Hi Allen, 

It's still early days with EUBA and I can't really provide any detail on availability.  

When Telecom Wholesale upgrade the DSLAM they'll usually sort out any congestion issues, as ADSL2+ speeds will effectively make service worse if they don't.

Telecom are still doing BUBA on ADSL2+, not sure why anyone would think that they weren't. 



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