Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
R_Colin_Johnson
User Rank
Blogger
Re: Spectral Efficiency
R_Colin_Johnson   7/15/2014 2:32:15 PM
NO RATINGS
I asked your question ("What's the catch?") to the Bell Labs experts and this is what they said: "Distance is one part of the answer; we're also doing some undisclosed optimizations to get the most out of the 2-pair/30m case."

Tibor.boros
User Rank
Rookie
Spectral Efficiency
Tibor.boros   7/12/2014 1:12:14 PM
NO RATINGS
It seems the spectral efficiency without bonding (1 pair) is 5.7 bps/Hz, while with bonding (2 pairs) it is 10 bps/Hz. What's the catch? Distance (70m vs. 30m)? I would still not expect such a big difference.

R_Colin_Johnson
User Rank
Blogger
Re: G Fast Details
R_Colin_Johnson   7/10/2014 2:30:23 PM
NO RATINGS
G.fast is an acronym for Fast Access to Subscriber Terminals and its main purpose is just that--to get higher speeds from digital subscriber lines (DSLs). It is modeled on Very-high-bit-rate digital subscriber line 2 (VDSL2) which was designed to get high-speed data over the copper telephone wires already in older buildings (VDSL2 was defined as standard ITU-T G.993.2 in 2005.) The only thing exotic about G.fast is its promise of 200-to-500 megabit per second speeds for DSL.

Loperman
User Rank
Rookie
G Fast Details
Loperman   7/10/2014 2:08:23 PM
NO RATINGS
anything new or exotic about the G Fast electronics?



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Curiosity Killed the Cat (Just Call Me Mr. Curiosity)
Max Maxfield
23 comments
My wife, Gina The Gorgeous, loves animals. She has two stupid dogs and two stupid cats. How stupid are they? Well, allow me to show you this video of the dogs that I made a couple of years ...

Martin Rowe

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
Post a comment
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
13 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Martin Rowe

Book Review: Controlling Radiated Emissions by Design
Martin Rowe
1 Comment
Controlling Radiated Emissions by Design, Third Edition, by Michel Mardiguian. Contributions by Donald L. Sweeney and Roger Swanberg. List price: $89.99 (e-book), $119 (hardcover).