PDXPLT
join:2003-12-04
Banks, OR | Old News Too bad there's this trend now of universities and academics doing clumsy PR.
Cioffi at Stanford (who invented much of DMT DSL technology, BTW) has been saying for awhile that VDSL up to 1 Gbps may be possible on 4 bonded pairs. That's 250 Mbps per pair. This assumes the lines are short enough, and full MIMO (for interference mitigation) is used.
For background, see »isl.stanford.edu/~cioffi/dsm/tut/chap11.doc. Note in section 11.6: "A 500-meter binder of 50 pairs could carry 10 Gbps total capacity symmetrically and reliably". That's 200 Mbps per pair. |
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| You do realize how short 500 meters is right? And to carry that data any further they need to pull an optical cable to that 500 meter point to demarcation. So what you have is a fridge sized phone box on every single block and fiber pulled to everyone of them. If your going that far why not lay the fiber to the home and forget the copper and all it's weaknesses? |
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dcs2281
join:2004-09-14
Santa Clarita, CA | reply to PDXPLT
I believe the guy is going to work for or with Cioffi according to other sources to perfect it. Cioffi couldn't get it to well at any distance, so they are going to team up. |
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