[AusNOG] Small Scale VDSL/2

[Robert Hudson]

As I understand it, you can run xDSL over CAT5e easily enough (goodness
knows that's exactly how my household is currently wired). You may struggle
to run much in the way of ethernet over two wires (I am aware of EoC,
though as I understand it, that requires more than a single pair?).

As you noted, the cost of the actual cable (CAT5e vs TP) would not likely
be significant, though other parts of the build may be ( you can trunk
larger numbers of pairs in 25-pair cables and split off each connection
roughly where you need to), so although CAT5e is less likely to be a
technology blocker in the future, you may have more issues with it than
just additional cable cost (duct space, flexibility [not that 25-pair
cables are flexible)], additional handling requirements during install,
etc).

That said, for structured cabling, would you not choose CAT6 anyway over
CAT5e? Particularly as it has better inter-pair cross-talk and attenuation
properties due to the physical separation of the twisted-pairs (could you
in fact deliver four two wire services from each CAT6 cable, or two per
cable and leave a spare pair at each termination point to dwal with either
post-installation faults with any given pair, or perhaps the option to run
four-wire services should they be required).
On 19/09/2013 6:28 PM, "Paul Gear" <ausnog at libertysys.com.au> wrote:

> On 09/19/2013 03:44 PM, Joseph Goldman wrote:
>
>> Hi List,
>>
>>  Looking for some hardware recommendations for small scale VDSL/2
>> deployments. Looking for initial deployment to support 30-40 subscribers
>> with ability add more hardware and scale to possibly 200-300 subscribers.
>>
>> Thanks,
>> Joe
>>
>
> Hi all,
>
> An adjunct question to this: if you had a new green field deployment and
> had the option of going Cat5E & Ethernet vs. two-wire & VDSL2, what
> considerations would dictate your choice of one over the other?  Assume
> that everything is within Ethernet distances. Obviously cabling cost would
> be different, but given labour costs of installation, how different is it
> likely to be, and would technical considerations override cost?
>
> Regards,
> Paul
>
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