<div dir="ltr"><div>Without getting too political (as I am apt to do), there are a few fundamental realities here:<br><br></div>1. The cost of replacing the copper last mile will probably be delayed until the last possible moment.<br>
<div>2. Shannon and Hartley cannot be argued with when you have a bandwidth-limited transmission medium.<br></div><div>3. Wholesale HFC is right for the wholesale picking and has like a LOT of RF spectrum if you re-farm.<br>
<br></div><div>What does this mean? Hell, if I knew, I'd be making money, not posting.<br><br></div><div>Hope you're all having an awesome weekend :)<br><br></div><div>-Curtis<br></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Fri, Jul 11, 2014 at 9:19 PM, John Lindsay <span dir="ltr"><<a href="mailto:johnslindsay@mac.com" target="_blank">johnslindsay@mac.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
That's the politically acceptable version and serves current purposes.<br>
<br>
What actually happened was the competitive DSLAM operators refused to allow Telstra to remonopolise the copper CAN downstream of nodes.<br>
<br>
Now we have a federal government that is prepared to do that so the landscape has changed.<br>
<br>
Except the loser this time will be Telstra, who must be having a good old ponder about things about now.<br>
<span class="HOEnZb"><font color="#888888"><br>
John Lindsay<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
> On 11 Jul 2014, at 9:08 pm, Guy Ellis <<a href="mailto:guy@traverse.com.au">guy@traverse.com.au</a>> wrote:<br>
><br>
> Hi Paul,<br>
><br>
> I think this is a symptom, rather than a root cause.<br>
> When the FTTP rollout was announced, changes to the bandplan for VDSL seemed unnecessary and went on to the backburner.<br>
> Suddenly there is a bit of a scramble to get this sorted.<br>
><br>
> Regards,<br>
> - Guy.<br>
><br>
><br>
>> On 11/07/2014 8:24 PM, Paul Brooks wrote:<br>
>>> On 11/07/2014 5:37 PM, jake anderson wrote:<br>
>>>> On 11/07/2014 5:10 PM, Guy Ellis wrote:<br>
>>>> Hi Reuben,<br>
>>>><br>
>>>> There are two reasons why there has been little VDSL2 deployment locally...<br>
>>>><br>
>>>> (i) Optimum loop length is ~<800m and the old exchanges are just too far apart.<br>
>>>> You must have nodes in order get most subscibers <800m.<br>
>>>><br>
>>>> (ii) In the case of iiNet, Optus and TPG their DSLAM rollouts were completed last<br>
>>>> decade and are only ADSL2+.<br>
>>>> Given that we have known that some from of NBN has been coming for years, and the<br>
>>>> CAN uncertainty, no operator in their right mind is going to spend $$$$ on VDSL2<br>
>>>> linecard upgrades, let alone think about deploying nodes.<br>
>>>><br>
>>>> There are no technology problems with VDSL2, other than the rules of physics and<br>
>>>> Shannons law!<br>
>>>> FTTN has been already deployed in many countries using VDSL2.<br>
>>>> Hopefully Australia will see some benefits as a late-comer with enhancements such<br>
>>>> Vectoring and Bonding.<br>
>>>> FTTH would be nice but it's not going to happen with this Government.<br>
>>>><br>
>>>> Regards,<br>
>>>> - Guy.<br>
>>> I always wondered why they never offered VDSL for customers closer than 800m or so.<br>
>>> I mean it wouldn't cost them a *great* deal to add a few vdsl linecards to the mix.<br>
>> There's also the issue that VDSL2 is not allowed on the public copper network yet,<br>
>> until the CA C559 code is updated to include the higher frequencies. Until this<br>
>> happens, VDSL2 is OK within buildings, but not on copper from Telstra exchanges or RIM<br>
>> cabinets (Or FTTN cabinets). There are exceptions permitted within C559 for trials,<br>
>> which the NBN/Telstra FTTN trial is relying on.<br>
>><br>
>> TransACT is a special case, as they deployed their own dedicated copper cables from<br>
>> their node cabinets to the homes, TransACT's VDSL2 doesn't run along Telstra copper.<br>
>><br>
>> FWIW, there is a Comms Alliance VDSL2 Working Group active now working (for the second<br>
>> time) to update C559 to bring VDSL2 into the permitted technologies list to enable FTTN.<br>
>><br>
>> (back to the football.....)<br>
>><br>
>> Paul.<br>
>><br>
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><br>
> --<br>
> Guy Ellis<br>
> <a href="mailto:guy@traverse.com.au">guy@traverse.com.au</a><br>
> <a href="http://www.traverse.com.au" target="_blank">www.traverse.com.au</a><br>
> T: <a href="tel:%2B61%203%209386%204435" value="+61393864435">+61 3 9386 4435</a> M: <a href="tel:%2B61%20419%20398%20234" value="+61419398234">+61 419 398 234</a><br>
><br>
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