[AusNOG] "The NBN" will run on copper for *ever*

[Guy Ellis]

Hi Paul,

I think this is a symptom, rather than a root cause.
When the FTTP rollout was announced, changes to the bandplan for VDSL 
seemed unnecessary and went on to the backburner.
Suddenly there is a bit of a scramble to get this sorted.

Regards,
  - Guy.


On 11/07/2014 8:24 PM, Paul Brooks wrote:
> On 11/07/2014 5:37 PM, jake anderson wrote:
>> On 11/07/2014 5:10 PM, Guy Ellis wrote:
>>> Hi Reuben,
>>>
>>> There are two reasons why there has been little VDSL2 deployment locally...
>>>
>>> (i) Optimum loop length is ~<800m and the old exchanges are just too far apart.
>>> You must have nodes in order get most subscibers <800m.
>>>
>>> (ii) In the case of iiNet, Optus and TPG their DSLAM rollouts were completed last
>>> decade and are only ADSL2+.
>>> Given that we have known that some from of NBN has been coming for years, and the
>>> CAN uncertainty, no operator in their right mind is going to spend $$$$ on VDSL2
>>> linecard upgrades, let alone think about deploying nodes.
>>>
>>> There are no technology problems with VDSL2, other than the rules of physics and
>>> Shannons law!
>>> FTTN has been already deployed in many countries using VDSL2.
>>> Hopefully Australia will see some benefits as a late-comer with enhancements such
>>> Vectoring and Bonding.
>>> FTTH would be nice but it's not going to happen with this Government.
>>>
>>> Regards,
>>>   - Guy.
>>>
>>>
>> I always wondered why they never offered VDSL for customers closer than 800m or so.
>> I mean it wouldn't cost them a *great* deal to add a few vdsl linecards to the mix.
> There's also the issue that VDSL2 is not allowed on the public copper network yet,
> until the CA C559 code is updated to include the higher frequencies. Until this
> happens, VDSL2 is OK within buildings, but not on copper from Telstra exchanges or RIM
> cabinets (Or FTTN cabinets). There are exceptions permitted within C559  for trials,
> which the NBN/Telstra FTTN trial is relying on.
>
> TransACT is a special case, as they deployed their own dedicated copper cables from
> their node cabinets to the homes, TransACT's VDSL2 doesn't run along Telstra copper.
>
> FWIW, there is a Comms Alliance VDSL2 Working Group active now working (for the second
> time) to update C559 to bring VDSL2 into the permitted technologies list to enable FTTN.
>
> (back to the football.....)
>
> Paul.
>
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-- 
Guy Ellis
guy at traverse.com.au
www.traverse.com.au
T: +61 3 9386 4435 M: +61 419 398 234