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

[Guy Ellis]

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.



On 11/07/2014 3:47 PM, Reuben Farrelly wrote:
> On 11/07/2014 1:51 PM, Mark ZZZ Smith wrote:
>>> So real world scenarios will see the standard shitty average of
>>> around 7mbps...which is deemed acceptable as its > 1.5mbps.
>>
>> Can you provide some evidence of this future FTTN 'standard shitty
>> average of around 7mbps'?
>>
>> The following presentation shows that a lot of people are already
>> getting close to or more than 7Mbps from ADSL1/2/2+. VDSL2/2+ should
>> easily provide greater than that on shorter FTTN lead-ins.
>
> I'm interested in why VDSL/VDSL2 hasn't become more widespread 
> already, regardless of the NBN.  I thought the lack of it was to do 
> with ACIF and regulations around interference on PSTN services, but as 
> there are small pockets of VDSL already (TransACT, for example and now 
> the NBN trial), perhaps that is not (or is no longer) the case.
>
> Is the lack of VDSL deployment to date due to a technology problem, a 
> regulation problem or an economic constraint?
>
> Surely the ISPs installing DSLAM gear into exchanges didn't lock 
> themselves into buying gear that cannot or could not be upgraded 
> beyond ADSL2+ speeds?
>
> Reuben
>
>
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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