Achieving Fiber-Optic Speeds over Copper Lines

murdoc8

A 100-year-old networking trick could boost transmissions over telephone infrastructure.

By Christopher Mims
Alcatel-Lucent has developed a prototype technology that could dramatically increase the speed of data communications over the copper wires that make up the majority of the world's telephone infrastructure. The technology combines three existing techniques, known as bonding, vectoring, and DSL phantom mode. It can reach speeds of 300 megabits per second at a distance of 400 meters from a communications hub, and 100 megabits per second at one kilometer.

rest of the story here
http://www.technologyreview.com/communications/25158/page2/

Freddie59

murdoc8 wrote: »

A 100-year-old networking trick could boost transmissions over telephone infrastructure.

By Christopher Mims
Alcatel-Lucent has developed a prototype technology that could dramatically increase the speed of data communications over the copper wires that make up the majority of the world's telephone infrastructure. The technology combines three existing techniques, known as bonding, vectoring, and DSL phantom mode. It can reach speeds of 300 megabits per second at a distance of 400 meters from a communications hub, and 100 megabits per second at one kilometer.

rest of the story here
http://www.technologyreview.com/communications/25158/page2/

400 metres??!!:P

But what is it at 2,3, and 4 etc Km?

Sounds suspiciously like a variant of Cable's Docsis 3.

murdoc8

Freddie59 wrote: »

400 metres??!!:P

But what is it at 2,3, and 4 etc Km?

Sounds suspiciously like a variant of Cable's Docsis 3.

im not sure,i think the day that eircom tries something new is the day we see
axle grease dripping from the phone lines

yuloni

This post has been deleted.

Cryos

Seems awfully presumptious, alot of "Should".

Be nice to see some details around the technology (after a scrounge couldnt find anything?), especially how it copes with loss over distance, that after all is where the problem does lay. Speeds around metro areas havent really been a problem, its that last mile the 2/3/4/5km mark where signal is poor.

crawler

Professor John Cioffi talks a lot about this in his research with Stanford - Vectoring, phantom, Dynamic spectrum management etc etc etc all make amaing speeds possible in theory - the problem is, it is a long way from the research labs to a commercial product...Interesting all the same

Also - mostly only one pair into many home sin IReland

watty

You need short lines and lots of spare pairs.

It's appropriate to putting fibre to basement of a skyscraper or apartment block. Not Rural and in most cases not suburban Ireland. In Urban Ireland FTTC/FTTK and UPC cable is cheaper or available.