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Mark Seery
Mark Seery
12/5/2012 | 3:05:27 PM
re: Got FiOS? Say Goodbye to DSL
>> I'd argue that for short distances, for the same bw and performance, fibre happens to be far more expensive than copper, overall. A 1 gig phy pair costs $4/port-pair and cable is about $1.5 per metre. These are significantly less that optics and fibre cost, without even considering splice costs and installation.

Over longer distances, this story changes dramatically, of course. Since this article is abut the last mile, I do assume we are talking short distance transmission here. <<

WRT to greenfields I would observe:

a) most new builds tend to be fiber which provides one data point
b) many people have observed the impact of the rising cost of copper over the last few years on the business case for last mile cabling (especially if that copper is going to get stolen for its value).

However, I think this thread is mostly concerned with the value, or not, of existing copper in the ground (as the thread started with the assertion that copper should be ripped out, thrown away, and replaced by WiMax, "...like the rest of the planet").

On that score we can observe that the existing copper in the ground can be made to perform quite nicely, arguably better than many of the currently available wireless technologies, given:

a) FTTN architecture
b) FEC/Vectoring/bonding/etc...

I have been told, but have not been able to confirm, that one of the PUCs has ordered VZ not to remove the copper. If this is true:

a) PUCs have the ability to intervene if they so wish
b) there is another data point which points to some entity's perception of the value of the existing copper.

with respect to b) it is possible that some people think a CLEC might be able to pursue an alternative business model to the ILEC, one that has value to consumers, even if CLECs can not pursue the same business model as the ILEC.
12/5/2012 | 3:05:27 PM
re: Got FiOS? Say Goodbye to DSL

While I agree with your points. I've been involved in pricing both. But the last mile is really the last mileS from the CO to the home. The exception is the FTTN model where the distance is usually less than a block (post to home).

But the line from the post to home is where things like water effects (corrodes) the connections and eventually penetrates the binding. The advantage fiber has over copper here is that wonce spliced the connection is more stable and water penetration is not as significant. But the cost of a media cut is much more significant for fiber.

So the economic cost hinges on will copper have worst long term degradations or will the line be cut by tree roots, homeowner or backhoe more often.


12/5/2012 | 3:05:23 PM
re: Got FiOS? Say Goodbye to DSL

I just did a quick LightReading message board search: "Nyquist" in the title or body of the message. Since mid-2004 there have been 17 posts (not including this one) containing that word. 11 were from Brookseven & 4 were responding to Brookseven. Only twice was Seven not responsible for invoking Nyquist's name on these boards since mid-2004.

12/5/2012 | 3:05:22 PM
re: Got FiOS? Say Goodbye to DSL

The correct way to look at the electron vs. photon is this: electrons/holes/ions/vacancies (in general, anything related to charge) are the carrier of current in conductors (regular, semi, super, nanowire, or YTBD).

OTOH, photons being neutral particles can not participate in direct conduction. IOW, you can not have a photon current in a copper wire.

True, electromagnetic waves travle in (say) copper at a speed close to c, but that is a concerted motion of the electrons that helps this transmission of energy in that medium. We can not have the same thing with photons. In a fiber or waveguide, where photons actually do transmit, it is a direct transmission of energy; quite different than conduction. Hope it is helpful.
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