Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
7720 posts

Uber Geek
+1 received by user: 298


  Reply # 505287 12-Aug-2011 00:32 Send private message

It does take time for them to test and switch everyone over, so may just be a matter of patience.

How many phone jacks at your place, is there an alarm that's wired to the phone wiring, how old is the house?

429 posts

Ultimate Geek

  Reply # 505302 12-Aug-2011 07:06 Send private message


I'm on Crownhill. suggests for my address that ADSL2+ on SWO/Exchange is scheduled for Sep 2011. And VDSL2 on SWO/Exchange scheduled for Sep 2011.

So chorus must be switching over houses early to the new adsl2+ gear in the exchange.

A month or two back I was having issues with peak time congestion , very high ping times and Cameron from Xnet has been in regular contact with Wholesale. Changeover of my address to the new equipment happened some weeks ago but ADSL2+ wasn't yet enabled. It was awaiting new ethernet backhaul capacity. I thought that everyone on Spotswood exchange would switch to ADSL2 at once. but maybe they are doing it in blocks.
A followup email from Cameron yesterday said that ADSL2+ still wasn't enabled and Wholesale couldn't give a date, then I saw that you have been switched!

Have you been following the Wholesale date at all? It was Dec 2010, then June 2011, then Sept 2011, then a week or so ago changed to completed Dec 2010, then back to scheduled Sept 2011.

Regards Allen.

429 posts

Ultimate Geek

  Reply # 506242 14-Aug-2011 13:31 Send private message

My ADSL2+ is enabled now! Not sure when exactly as I accidentally left my router on G.DMT instead of Auto. Hmm.

Synch speeds are up, speedtest upload speed isn't much better.
BTW I drove the route from my place to exchange. 1.5km

DSL Status:          UP
DSL Modulation Mode:   ADSL2+
Downstream Rate:           12437 Kbps
Upstream Rate: 946 Kbps
Downstream Margin:      8 db
Upstream Margin:            14 db
Downstream Line Attenuation:    27
Upstream Line Attenuation:          15
Downstream Transmit Power:      0
Upstream Transmit Power:           0 51ms, 9.90 down, 0.80 up

Regards Allen.

5966 posts

Uber Geek
+1 received by user: 108


  Reply # 506480 14-Aug-2011 21:51 Send private message

Hi so the attenuation is say 1.9km which is probably right as the cable path will not always go where you think, so 400m out is not a lot.

12.5Mb/s is on the money for 27dB.


429 posts

Ultimate Geek

  Reply # 506550 15-Aug-2011 07:44 Send private message

12.5Mb/s is on the money for 27dB.

The graph I found said it should be more like 18Mb/s for 27db?


Think I've found the reason for the difference....
"if you are on a Telecom wholesale port then they set their ISAMs up to target 12dB noise margins which means the best speed you will top out around 18-19Mb/s never more, but it will be very stable.

Its common that 15-16Mb/s is what you get out to the 1.5km region.

The internode speed graph if I am not mistaken reflects 6dB noise margins."

Regards Allen.  

5966 posts

Uber Geek
+1 received by user: 108


  Reply # 506554 15-Aug-2011 08:07 Send private message

As you have found 12dB noise margin is not reflected in the internode graph, 6dB instead. If you have a direct line with no house wiring other than a cat5e run from the demarc (I think thats what you said earlier) and your getting 12.5 then its probably all you will get and not that far off the mark.

The graphs do not also tell you how many other DSL services are in any one bundle (or cable), as the noise in the cable builds up with more users then things can get worse, if you are on a cabinet things are often better as the cabinet only has 25 or 50 pair distribution feeders running from it, where as an exchange 100 or 200 pair cables, so the noise possiblities are much greater.

Anyway end result is 12.5 is probably all you will get, complaining to Telecom will probably result in no action as they only have to achieve 10Mb/s for 80% of subs, hence most cabinets (and exchange lines) have been reduced to 1.5-2km max as a result of cabinetisation.

I have seen numerous situations where at 2km modems sync at 15Mb/s so it is possible but as mentioned without an understanding of pair density (and active DSL on those pairs) you cannot put certain numbers on various speeds.



1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic

Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Trending now »
Hot discussions in our forums right now:

Windows 10 announced, as well as developer preview
Created by macuser, last reply by Regs on 1-Oct-2014 22:24 (48 replies)
Pages... 2 3 4

Moment of Truth?
Created by BarTender, last reply by JimmyC on 29-Sep-2014 09:16 (441 replies)
Pages... 28 29 30

Can i have 2 ISP's at home?
Created by ReckITT, last reply by Lazarui on 30-Sep-2014 18:15 (49 replies)
Pages... 2 3 4

Why is your nickname what it is, what are the origins of it?
Created by Presso, last reply by hsvhel on 1-Oct-2014 11:52 (89 replies)
Pages... 4 5 6

What time will the Apple Store online be selling the iPhone 6?
Created by scotiwis, last reply by thewanderingv on 1-Oct-2014 22:49 (110 replies)
Pages... 6 7 8

iPhone 6 From Spark - Order Dates and Pricing?
Created by Otagolad, last reply by mahdibassam on 1-Oct-2014 17:03 (348 replies)
Pages... 22 23 24

Easiest way to have iPhone warranty service
Created by JoshWright, last reply by nitrotech on 30-Sep-2014 21:37 (15 replies)

Passwords and pesky teenagers
Created by martyyn, last reply by DaveDog on 1-Oct-2014 12:28 (26 replies)
Pages... 2

Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.