<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">You mean like this (hosted on the same website):
<div>http://nbnmyths.files.wordpress.com/2010/09/dsl-speed-comparisons.jpg</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">or this:</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">http://www.asotel.net/files/pics/news/grafikVDSL2%29eng.png</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">The other
thing I'm curious about on that original graph is whether it is downstream, upstream or both combined ?<br>
<br>
If at 2000m you get either 18/1Mbps ADSL2+ or 11/11Mbps VDSL2 then thats
fairly close to the same amount of total bandwidth (19 v's 22). This probably doesn't please the user though as they
want faster downloads (to "obtain" the latest TV eps) and hence an
option to choose which "DSL" you want might be of benefit depending on your intended usage of the link.<br>
</div><div><span><br></span></div>
<div><span>I'm not arguing for a FTTN network (I want my FTTH) but discussion needs to be responsible.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>regards,</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>Tony.<br></span></div><div><br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div
style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> "Beeson, Ayden" <ABeeson@csu.edu.au><br> <b><span style="font-weight: bold;">To:</span></b> Guy Ellis <guy@traverse.com.au> <br><b><span style="font-weight: bold;">Cc:</span></b> "ausnog@lists.ausnog.net" <ausnog@lists.ausnog.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, 13 September 2013 9:39 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [AusNOG] ADSL2+ line sync data<br> </font> </div> <div class="y_msg_container"><br>Absolutely no idea tbh, it's an ofcom graph, that's all I know.<br><br>Seemed optimistic for adsl2+ as well tbh... I would have assumed closer to 1-1.5km for the crossover as well...<br><br>Guy Ellis
<<a ymailto="mailto:guy@traverse.com.au" href="mailto:guy@traverse.com.au">guy@traverse.com.au</a>> wrote:<br><br><br>Hi Ayden,<br><br>Do you know what VDSL2 profile was used for those tests?<br>It doesn't look anything like our results or AT&T's for that matter.<br><br>Normally VDSL2 and ADSL2+ intersect at around the 1.6km mark!<br><br>Regards,<br> - GUy.<br><br><br><br>On 13/09/2013 8:10 AM, Beeson, Ayden wrote:<br>> However, the bandwidth drop is even more drastic on vdsl. At a distance of even 500 metres your average bandwidth is drastically lower then where it started.<br>><br>> <a href="http://nbnmyths.files.wordpress.com/2011/06/fttn-speed-graph.gif" target="_blank">http://nbnmyths.files.wordpress.com/2011/06/fttn-speed-graph.gif</a><br>><br>> Unfortunately, as you can see by the graph, you have to be less than 300 metres (poor copper condition not factored in) to get the promised 50mbit and at ~500 metres+ it's
worse than adsl 2+ across the board.<br>><br>> Guy Ellis <<a ymailto="mailto:guy@traverse.com.au" href="mailto:guy@traverse.com.au">guy@traverse.com.au</a>> wrote:<br>><br>><br>><br>> Paul,<br>><br>> In response to your challenge (Exercise for the reader - work out how VDSL2 would be any different)...<br>><br>> In contrast to the current ADSL2+ network, there are 3 big differences with the proposed VDSL2 FTTN deployment -<br>> (i) shorter loop lengths (700-800m)<br>> (ii) vectoring (crosstalk--)<br>> (iii) bonding (speed++)<br>><br>> While such a VDSL2 network is not as good as fibre, it's no where near as bad as the current ADSL2+ network.<br>> Right now some poor folks are on 6km loop lengths, there's plenty of crosstalk and getting bonding working is a challenge.<br>><br>> Regards,<br>> - Guy.<br>><br>><br>><br>><br>> On 12/09/2013 12:17 PM, Paul Brooks
wrote:<br>> A recent Ofcom (UK) report has a very interesting chart of ADSL2+ line speeds:<br>> Ofcom Infrastructure Report 2012 Update<br>> <a href="http://stakeholders.ofcom.org.uk/market-data-research/other/telecoms-research/broadband-speeds/infrastructure-report-2012/" target="_blank">http://stakeholders.ofcom.org.uk/market-data-research/other/telecoms-research/broadband-speeds/infrastructure-report-2012/</a><br>> <a href="http://stakeholders.ofcom.org.uk/binaries/research/telecoms-research/infrastructure-report/Infrastructure-report2012.pdf" target="_blank">http://stakeholders.ofcom.org.uk/binaries/research/telecoms-research/infrastructure-report/Infrastructure-report2012.pdf</a><br>> Figure 4 on page 11:<br>> [cid:<a ymailto="mailto:part3.03040307.07050500@traverse.com.au" href="mailto:part3.03040307.07050500@traverse.com.au">part3.03040307.07050500@traverse.com.au</a>]<br>> This chart is effectively the result of the ADSL
line-sync/attenuation curve combined with the increasing area of circles of increasing radius around the exchange - and demonstrates very clearly why so many people get low ADSL2+ line speeds.<br>> (Exercise for the reader - work out how VDSL2 would be any different)<br>><br>> Also scatter-plots of sync-speed with line-length, as per Figure 8 from another UK report:<br>><br>> [cid:<a ymailto="mailto:part4.02010504.05090509@traverse.com.au" href="mailto:part4.02010504.05090509@traverse.com.au">part4.02010504.05090509@traverse.com.au</a>]<br>> Now every DSLAM network operator can put together similar charts - but I'm not aware of any stats for Australian networks, apart from the heat maps put out by iiNet and the adsl2exchanges.com.au site, which aren't quite what I'm looking for.<br>> For all you DSLAM operators - I would be very interested in putting together similar charts for the Australian networks, to see how our copper loop
network varies from the UK network. If anyone is willing to share data or statistics, I'm very interested in pulling together similar Australian charts - on a non-identified, aggregated, anonymised basis if you wish.<br>> Please contact me off-list - thanks.<br>> Paul.<br>><br>><br>><br>><br>><br>><br>> _______________________________________________<br>> AusNOG mailing list<br>> <a ymailto="mailto:AusNOG@lists.ausnog.net" href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><mailto:<a ymailto="mailto:AusNOG@lists.ausnog.net" href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a>><br>> <a href="http://lists.ausnog.net/mailman/listinfo/ausnog" target="_blank">http://lists.ausnog.net/mailman/listinfo/ausnog</a><br>><br>><br>><br>><br>> --<br>> Guy Ellis<br>> <a ymailto="mailto:guy@traverse.com.au" href="mailto:guy@traverse.com.au">guy@traverse.com.au</a><mailto:<a
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