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Closing In On 1Gbps Using DSL
angry tapir writes "DSL vendors are using a variety of methods, such as bonding several copper lines, creating virtual ones, and using advanced noise cancellation to increase broadband over copper to several hundred megabits per second. At the Broadband World Forum in Paris, Nokia Siemens Networks became the latest vendor to brag about its copper prowess. It can now transmit speeds of up to 825M bps over a distance of 400 meters."
Um. great, how many people are within 2 city blocks of the local wire center?
They need to be working on extending the speeds out past 15,000 feet (5,000M) if they want folks to get excited.
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Unfortunately, I still find myself with a 2 Mbps download speed tops. This technology needs to be actually utilized! It's killing me to read this stuff and then never see it in action.
They are using 4 pairs to achieve that 825 Mbps speed.
Note that 1000BASE-T also uses 4 pairs to achieve 1000Mbit over a shorter 100 meters. I'm curious what maximum range 1000BASE-T will actually work at (100m is guaranteed), and if it were to work at 400m, what the bandwidth would be.
Better known as 318230.
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most cable connections are asymmetric too, and my experience has been that around here the warez monkeys love their cable modems, so i get consistently better gaming latency out of my 1.5 / .75 ADSL than my brother gets at my parent's house on a 20 something / whatever cable connection. sure he can download a game in the time it takes to microwave some dinner, but online play is worse, and less predictable. i am within 10ms of the same latencies every day
Snowden and Manning are heroes.
The 30 up exists simply because it doesn't cost them anything extra to provide it. The fact is, they can oversell the up by a factor of 10 and probably no one would ever notice it. It's because 90% of all fiber traffic is downstream. That's because while there are some people who are sharing their entire movie and music collections with the masses, most people are watching youtube, hulu, etc...
So, while you get 30 up, and when connecting to others on the same provider's network, you're getting 30 up, the provider is simply throttling the overall up at their data center where they host servers for other businesses.
Remember the provider isn't paying for 10 terabit up and 500 gigabit down. They have a large group of switched fibers. They still run much of it over OC-(insert big number here) networks as Sonet is for the time being a hell of a lot easier to load balance and provide redundancy on than using massive Ethernet load balanced trunks.
So, what are they going to do with 9.5 terabits of unused upstream anyway?
Also remember that with the exception of P2P traffic, upstream between providers is becoming less important since Akamai, Google, etc... are distributing content all over the Internet anyway. If you're a provider with so much as 4U of rack space to spare, Google or Akamai will gladly install a caching server that will offload insane amounts of traffic from you. So if you have 100,000 users all watching the same viral video on youtube, after the first time it's viewed on your ISP, the video is probably located on a server at your ISP.