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150 Mbit/s DSL.
surstrmming writes "German company Infineon have released their new QAM
VDSL Plus
chips, providing 150 Mbit/s data rates over ordinary copper wire." Note that that kinda throughput is at the 1000 feet mark... but the chip can still serve up 4mbps even at 13,000 feet.
As the subject says, 99.9% of the the people out there are limited not by the capability of the line, but by the limits imposed by the service provider.
TODO: Something witty here...
VDSL Leaders Announce VDSLPlus: Data Rates Up to 150Mbps and Extended Reach Exceeding 4 KM Using Robust QAM Technology
2003-06-11
Joint news release of Infineon and Metalink
Munich, Germany and Yakum, Israel â" June 11, 2003 â" Addressing the market demand for ever greater reach for VDSL and ever greater bandwidth over a single pair, Infineon Technologies (FSE/NYSE: IFX) and Metalink (Nasdaq: MTLK), today announced they are each developing VDSLPlus, which introduces a fifth-band extension of standard VDSL technology. VDSLPlus will enable service providers to offer scalable DSL services ranging from short range applications at data rates up to 150 Megabits per second (Mbps), to long reach applications that allow for more than 4Mbps rates over distances of 4km (13,200 ft) using the same line-card and Customer Premise Equipment (CPE) designs.
VDSLPlus will use a new frequency âoebandâ above the current 12 MHz limit, as defined by international VDSL standards, to achieve the highest speeds ever reached in data transmission over standard twisted-pair copper wire. The benefits of the extended QAM VDSL technology include:
"Infineon and Metalink continuously work to extend the capabilities of QAM VDSL, each making great strides in advancing the technology. As Service Providers and Carriers have mass deployed and gotten familiar with QAM VDSL over the four years it has been in the market, their demands have grown for increased VDSL bandwidth and reach, while they want QAM to maintain its highly cost effective, scalable deployment model. Metalink and Infineon are committed to collaborating with other industry leaders in extending the open QAM VDSL specifications and definitions to continuously meet this demand while preserving strict compliance to international standards," said Tzvika Shukhman, Chairman and CEO of Metalink.
Metalink and Infineon continue to be committed to teaming with other QAM PHY and system companies to promote VDSLPlus standardization in the various standar-dization bodies and to extend the companiesâ(TM) already proven interoperability to the new technology. The two companies are the only suppliers to have demonstrated fully interoperable, commercially available VDSL products.
" The accelerated market demand for enhanced VDSL drives the cooperation between Metalink and Infineon, especially in Asia Pacific and Japan where QAM VDSL is a huge ongoing success. VDSLPlus is an extension to field-proven QAM-VDSL technology, incorporating enhanced integration levels, higher bandwidth capacity, and greater reach capabilities. With more than two million QAM VDSL lines in service generating revenue for Operators and more than a hundred system vendors who already offer QAM-based VDSL platforms, QAM is accepted as the de-facto line code for VDSL,â said Christian Wolff, Vice President of Infineon's Communications Business Group and General Manager of the Access Business Unit.
QAM VDSL chipsets and systems, supporting the ITU, ETSI, Chinese, and ANSI band allocation plans, provide very high speed data transmission rates over robust, noise-immune QAM links enabling simultaneous video, data, and voice services over single-pair copper wires. The inherent simplicity of the QAM line code is demon-strated in superior cost and power advantages over competing VDSL line codes, yet with QAMâ(TM)s sophisticated features and benefits. These advantages are f
It's not a technical problem.
DMCA, Hollings, Palladium. What might have sounded like paranoia is now common sense.
If I may karma whore for a bit, what is this "QAM" busniess?
QAM stands for "Quadrature Amplitude Modulation" which is a fancy name for a simple concept. Also called "I/Q modulation" it's a way to transmit two data streams over the same carrier signal.
The streams are combined in such a way that they can be separated at the other end by using the two most elegant mathematical theorems of man, sine and cosine. What happens, in basic terms, the streams are at "right angles" to each other in the signal.
Being able to have two carriers worth of data can provide a geometric increase in capacity; this was also the technology that was going to be behind "Stereo AM" radio, but that never made it off the ground (Stero AM would have been cool since it would only have to use one frequency for both left and right channels unlike our current analogue sterophonic FM that uses 2 channels).
Hilary Rosen's speech was about her love of money and her desire to roll around naked in a pile of money.
The usual reason it slows down is because their local data .
.
.
.
.
line to your local CO is over sold
They hook up more ppl than they should to the line to
maximize their profits, it is the same thing AOL did
back in the mid 90's just at a DSL scale vs. dial up
The whole shared bandwidth argument touted by DSL providers
against the cable modem ppl , is just a viable against
the DSL providers
If you abuse the network and over sell it, it is going to
slow down for ppl
You might try another DSL modem, NIC, and PC on the connection,
but if they are the same slower speed then your problem
most likely lies with them over selling the lines
Peace,
Ex-MislTech
google "32 trillion offshore needs IRS attention"
No wireless, high-speed connections can go for very long distances. (Although I'll be the first to jump at it when there is a technological leap that makes it possible)
Since long-hauls are everywhere, there's no chance that wireless alone is going to form an international network. In fact, many countries have very very long hauls, which means even wireless national networks aren't possible in many places.
Any encryption used will be poor... IPSec is nice and everything, but you don't want to waste that much CPU power, and delay, just to visit slashdot. Chances are, it'll stick with the current model. Normal communications will be either plain-text or poorly obfusticated, and only the sites that need serious security will use strong encryption, and they will use that for as little as possible.
Like I said, not until there is a technological breakthrough.
There's a funny one... Yes, I'm sure everyone will just assume your computer naturally gives off hundreds of times the ammount of electromagnetic energy of a cell phone. Not really undetectable...
Not really, perhaps in theory though. Create enough interference on the frequency range it uses, and you can stop it.
Free as in, without limits? As in, your electric bill?
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
You're sadly misinformed. True rate ADSL as it was originally planned was capable of 7 MBaud downstream. This was designed specifically to hold a television channel with the compression capabilities of the mid 90s. The lite version that was deployed has less power, supposedly to eliminate the need for trips to the premises to install filters, is only capable of 1.5 MBaud. Supposedly, they didn't find out until after they started deploying that the real world would still require the filters. So, we got stuck with a crippled version for no reason other than perhaps to reduce the electric bill of the switch by about 60%. Furthermore, only the people closest to a switch get that. Though in a major metropolitan area, my DSL connection is limited to about 768KB. The only reason I keep it versus cable is that my provider is very good about actually giving me the whole 768KB unlike some which would bottleneck you to modem speeds at their routers during peak traffic loads.
So, a very few might be able to get 1MBaud. I can't. I've tried to view 300KBaud streams and the quality/resolution is so little as to be worthless.
Also, I think 1MB of mpeg4 falls a bit short of what I'd expect to see on an IP based video stream. Chances are I'm going to be watching that on my computer display at times and it has 2048x1536 resolution. I at least expect HDTV signal resolution with good quality. Certainly anything being thought of now and thus not fully deployed until years down the road has to at a minimum target HDTV.
So, I'd like to see a minimum of about 30MBaud guaranteed bandwidth at the worst case distance. But that is just when thinking of current day consumer side technology. There are a lot of hardware advances in the labs now (and some even out of the labs) that could make good use of far more bandwidth than that. There are even production 3D displays available today.
So, my point is that someone looking at what to deploy today and looking at lifetimes in the range of 20-50 years before the deployment cost is paid off as many of these companies are doing, needs to be planning to provide a bandwidth that will be able to grow at a rate of at least 2X every 2 years if not 18 months. We are a long ways today from the 300baud modems of the early 80s and by the early 20s, we should plan to be just as far from 1.5MBaud. That would put us at about 4GB in the 2023 time frame and over 100 PBaud in the 2043 time frame (those that are saying now that there is no way you'd ever use that must not have lived through the 64K, 640K and other barriers of the past that were more than we'd ever need). Thus there is definitely a need for high quality (not plastic) fiber to the curve to be laid by any projects wanting to compete in the long term.