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Good News From The High-Speed Networking Front

Degrees writes "Over at Small Times there is an article about two Danish companies that want to make deploying fiber optic lines easier with MEMS-based packaging technology. (MEMS is Micro-Electro-Mechanical Systems - described here). Also mentioned is that the big three U.S. telcos are working on fiber to the home plans." And punkmac points to this eWeek article which begins "An Intel Corp. backed startup, SolarFlare Communications Inc. said Monday that it has developed a working prototype of a chip that will permit 10G-bps communications over standard CAT5e copper wiring. SolarFlare's chip will be used as evidence that 10G-bit over copper can be done, in anticipation of a draft IEEE standard to be developed later this year."

45 of 175 comments (clear)

  1. Damnit by iibbmm · · Score: 3, Funny

    Still not fast enough to beam my body from my bedroom to the office to hooters to the office to the bedroom.. all the while allowing at least marginal performance from the Vonage piggyback.

  2. Sign me up! by pair-a-noyd · · Score: 2, Interesting

    But only as long as it's nothing to do with a TELCO. I'm extremely happy with the QOS I get from RR and was VERY PISSED as the LACK OF QOS I got with DSL..

    1. Re:Sign me up! by ivan256 · · Score: 4, Interesting

      That's funny, I'm quite pleased with the SLA I have with Worldcom, and quite turned off by the lack of SLA with any non telco options.

      There's a difference between DSL and shitty DSL. Pick a company that *guarantees* the quality.

      Now, if this stuff they're planning involves any encapsulation like PPPoE, or any "value added" services beyond a gateway and a block of static IP addresses, they can keep it, but I'd much prefer the phone company over the cable company any day otherwise. It's a lesser of two evils thing. When the phone company sells you something, you get what they sold you. Cable companies have a habit of changing the service you signed up for on a whim, and regularly. That combined the willingness to take responsibilty for problems (provided you pay for the right agreements) makes the phone company a no-brainer choice between those two options.

    2. Re:Sign me up! by Inuchance · · Score: 2, Interesting

      True, but the last couple random decisions @Home/ATTBI/Comcast/whatever made were pretty good, I think. A while back, they increased the upstream from 0.13 Mbps to 0.26 Mbps (Numbers obtained directly from my modem's configuration pages), and recently from 1.8 Mbps downstream to 3.2 Mbps.

      Then again, I have had some troubles with my modem, mostly outage related. For example, the @Home to ATTBI transition lasted about half a week IIRC, and so my modem was down that entire time. Also, every now and then, my modem's upstream will cut out for about 30 seconds at a time as it regains block sync or whatever it is that cable modems do.

  3. Faster downloads!!! by Anonymous Coward · · Score: 2, Funny

    Sweet!!!!

    More porn at the speed of light and more carpel tunnel syndrome claims at your local hospital!!!

  4. Bandwidth available?? by DRUNK_BEAR · · Score: 3, Informative

    Getting ?fiber to the home? ? telecom?s long-sought solution to the problem of directly delivering high-quality and high-speed video may cause some more problems. Alright, this would be able to bring high bandwidth lines to homes, but how about backbones? The current technologies are still pretty much limited at 40Gb/s for one single fiber. And since all-optical networks are still developing, I believe it may still be a while before we can profit from this.

    --
    DrkBr
    1. Re:Bandwidth available?? by Anonymous Coward · · Score: 2, Informative

      No, the distance limit cited is 100 meters. This is not 10G to your house from the CO over copper. It's 10G from your L2 switch in the closet to your other switch in the office. "Over copper" does not mean "last mile access".

      current technologies are still pretty much limited at 40Gb/s for one single fiber

      Well, no. Here's a typical commercial 800 Gbps-per-fiber long-haul DWDM product (80 wavelengths x 10 Gbps/wavelength):

      This one supports 120 10Gbps channels, designed for 160 at 50 GHz spacing.

      OC-768 (40 Gbps) chipsets are all the rage, for 40 Gbps per individual wavelength, but a fiber carries more than one wavelength.

    2. Re:Bandwidth available?? by Merlisk · · Score: 2, Interesting

      Actually, this isn't quite true.

      The real issue is that there isn't a 'killer app' for the home that would justify fiber to the home.

      My ex-company has been trying for years to get investors to realize that putting HDTV to the home over IP is really the only way to go. This is the only 'killer app' in the near term that I can see. This company even had the digital rights figured out with studio contracts to prove it.

      As you may know, coax and satellite won't handle a full channel lineup with HDTV. And, with Video over IP, you get all of the synergies one would expect: clicking on an ad to go to the company's home page, one-click buying directly from TV ads, etc. It's all there and implemented but isn't being funded due to the cable monopolies.

      *sigh*

      --
      Failure is not an option. It comes bundled with your Microsoft product. -- Ferenc Mantfeld
  5. 10Gbps over Cat5e by Ray+Radlein · · Score: 4, Insightful

    Obviously, this ain't coming to the home for a few more years (heck, Gigabit switches are only just now getting home-use priced), but it'll sure be nice to not have to re-pull all that Cat5e cabling we ran all over our house, especially since we'll probably be in our fifties by then.

    At that type of transfer speed, the network should effectively vanish completely, even if we're streaming HD video to or from the downstairs entertainment center (I'm assuming that the internal bus bandwidths in the computers will have improved proportionally as well by then).

    1. Re:10Gbps over Cat5e by Doesn't_Comment_Code · · Score: 2, Insightful

      (heck, Gigabit switches are only just now getting home-use priced)

      I agree, we won't see them for awhile. But I always cheer the newest and greatest being released, because that means whatever used to be the newest and greatest (Gigabit switches in this case) will experience a nice price drop. The product hasn't lost any value. In fact, it probably getting better. But since it isn't the best you can get any more it doesn't have the extra price hop that comes with top-of-the-line status.

      --

      Slashdot Syndrome: the sudden, extreme urge to correct someone in order to validate one's self.
    2. Re:10Gbps over Cat5e by Doesn't_Comment_Code · · Score: 2, Funny

      Until the pipes coming into the homes are a lot faster (i.e. fiber-to-the-home, or fiber-to-the-neighbourhood), most consumers will not have a use even for 1Gbps Ethernet.

      Well, sometimes when I'm bored I send large files back and forth between computers on my home network. And I'm always looking for ways to be more efficient...

      --

      Slashdot Syndrome: the sudden, extreme urge to correct someone in order to validate one's self.
    3. Re:10Gbps over Cat5e by stecoop · · Score: 3, Informative

      Remeber that Network lines (CAT) are in paris of 4. So the speed of 10gbs is over 4 cables 2.5gbs each. I know that RG6 operates at 2200 MgHz. We have a room to grow from Cat5e (350 MgHz).
      Well' get there - Looking forward to Cat6 and Cat7. Here is the current rating for network lines:
      CAT-3 = Category 3, 3 pair 24 ga. solid wire - up to 16Mhz (No twist)
      CAT-5 = Category 5, 4 pair 24 ga. solid wire - up to 200Mbps. (avg. 13 twists per foot)
      CAT-5e = Enhanced Category 5, 4 pair 24 ga. solid wire - up to 350Mbps
      CAT-6 = Category 6, 4 pair 24 ga. solid wire - up to 550Mpbs
      CAT-6e = Enhanced Category 6, 4 pair 24 ga. solid wire - up to 1000Mbps
      CAT-7 = Category 7, 4 pair 24 ga solid wire - up to 2.4Gbps

      Soon as we develop a shielded style RG6 in pairs of 4 the 10Gbs would be achievable. Copper is limited by our switching technology - the major factor with Optical and Copper is the length of drops. You can run optical a greater distance.

    4. Re:10Gbps over Cat5e by peterjhill2002 · · Score: 2, Interesting

      10 Gbps over copper is here. Cisco will have a xenpak out by the end of the month for $600. It does not use Cat5 or Cat6, it uses infiniband cable. According to:
      http://www.intel.com/design/network/products/ optic al/serdes/txn17431.htm
      It is a "4X (8-signal pair) electrical connector. The connector is a shielded structure for low cross-talk"

      Of course you need something to plug the xenpak into, and that is where the money will be spent. Cisco is also releasing a 16 port 10/100/1000 switch with one slot for a xenpak for $20K. Not bad... especially with the 32 Gbps backplane cable they use for stacking.

    5. Re:10Gbps over Cat5e by Ungrounded+Lightning · · Score: 4, Informative

      Anyone know what the theoretical speed limit of copper cable is? 10Gbs seems faster than copper can go to me.

      Depends on its length, thickness, surrounding dilectric, shieling/balance/discontinuities, and the speed of the carrier/modulation. (For any given design of wire it's mainly the length.)

      Copper, not being a superconductor, has resistance. The resistance combines with the stray capacatance between the conductors to form a distributed RC low-pass filter/delay line, which attenuates and delays higher frequencies more than lower frequencies - progressively more as the wire gets longer.

      It gets even worse for REALLY high frequencies, because they create eddy currents in the copper that impede the penetration of current into the conductor, restricting the current to the outer part of the conductor (the "skin effect") and thus raising the effective resistance and exaggerating the frequency-selective attenuation.

      This selective attenuation and delay weakens the signal - more at high frequencies than at low. As the wire gets longer the signal gets weaker and competing noise pickup gets stronger, reducing the signal-to-noise ratio and thus the amount of signal that can be carried.

      But the selective attenuation and delay also distorts the waveform, creating "intersymbol interference" (stored charge from previous bits affecting the latest bit). This can be compensated for.

      Current technology using SERDESes (fast serial bit streams), with some compensation for the selective attenuation (both preemphasis at the transmitter and compensation at the receiver), can get 3 Gbps through about a yard of printed circuit, or several yards of wire. More advanced devices (using tricks like four-level encoding to get two bits per modulation perios and feedback from the receiver to the transmitter by a return path) can go faster and a bit farther. (A transciever using all four pair of a Cat-5e, as of last year, could get gigabit ethernet across 30 meters.)

      Frequency-domain techniques (like ADSL) can do still better. And coding schemes have been developed that get within 50% (turbo codes) or even 90%+ of the Shannon limit bit rate.

      But what IS the shannon limit bit rate: It depends on a LOT of things. The biggest are:
      - Length of the wire.
      - Thickness of the wire.
      - Quality of the dilectric around the wire.
      - Interference coupled into the wire (i.e. how many other wires are in that bundle, what signals they're carrying, {for twisted pair} how tight the twists are and how they vary from conductor to conductor), how hot the wire is, etc.

      You should be able to get gigabit rates to a box on your block with copper pair, with a small router there and fiber to the rest of the net. (This is "fiber to the curb".) For 10G or beyond you'll probably need CO-AX (ala cable TV) or fiber from the curb box as well - otherwise the curb boxes would need to be so close together that they get too costly - and you might as well have strung fiber from the one-per-neighborhood boxes.

      (Maybe they'll push it a little farther. But I wouldn't hold my breath. Remeber that, in the US at least, you've typically got Cat-3 to the "curb" box which serves no more than 100 homes. If you're going to spring the bux dig it up and string 5e or 6 you might as well string some fiber. Later that can easily be upgraded to Tbits and beyond by transciever changes at the ends.)

      --
      Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    6. Re:10Gbps over Cat5e by -tji · · Score: 2, Informative

      Okay, let me nit-pick the example on your otherwise correct statement..

      > even if we're streaming HD video to or from the downstairs entertainment center

      I'm currently streaming HD video from my entertainment center to/from my 450MHz G4 Cube using 100Mb Ethernet and el-cheapo $30 switches.

      Broadcast HD video is an approximately 20Mbps MPEG2 stream. So, it is not a burden on even modest hardware. Other HD formats, like cable, satellite, and HD-DVD might be a bit faster in the future - like maybe 40Mbps. But, it won't go much beyond that.

      The other option would be streaming uncompressed HD video (what would that be.. 1920(x) * 1080(y) * 32 (bpp) * 60 (fps) = 2.9Gbps for 1080p ). That's excessive even in a 10Gbps network, and it's unnecessary because all forms of HD will be transferred in a compressed format.

      The other factor is whether our benevolent entertainment overlords will ALLOW us to xfer HD content around the house.. The broadcast flag, and all the security/crypto standards used for cable, satellite, and HD-DVD will stifle many of these really obvious uses of future home networks.

  6. Cool but... by DR+SoB · · Score: 4, Interesting

    "SolarFlare's chip will be used as evidence that 10G-bit over copper can be done, in anticipation of a draft IEEE standard to be developed later this year." "

    Copper breaks down to easy, picks up to much interference, and is no good maintaining the speed over longer distances. They should concentrate on new technology instead of constantly trying to upgrade the old, now matter how much work you put into a '68 Mustang, it's always going to weigh a ton...

    --
    Mod +5 Drunk
    1. Re:Cool but... by mystery_bowler · · Score: 4, Insightful

      Yes, but for a telecom, re-wiring is a pretty heavy investment. Depending on what state they are operating in there are different requirements for using unionized labor, there's literally tons of mechanical equipment involved, etc.

      I'm not sure where the point of diminishing returns is, but it's still quite important that someone concentrate on taking the utmost advantage of copper since a lot of people are going to be stuck with it for a while.

      --

      My sigs always suck.
    2. Re:Cool but... by FreeLinux · · Score: 4, Insightful

      Copper breaks down to easy, picks up to much interference, and is no good maintaining the speed over longer distances. They should concentrate on new technology instead of constantly trying to upgrade the old

      It's funny but, that's what people said when networking vendors:

      Increased modem speeds each time from 300bps to 56Kbps.
      Introduced xDSL and then increased its speed.
      Moved Token-Ring from 4Mbps to 16Mbps and then 100Mbps.
      Move ethernet from 10Mbps to 100 Mbps to 1Gbps.

    3. Re:Cool but... by Garak · · Score: 2, Insightful

      Wireless is fine if your only serving a few customers but once you get over a certain point it becomes very slow.

      Wireless is open air is basicly the same thing as cable modems. There is only so much useable bandwidth in the spectrum. Cablemodems are atleast limited to a coax, while wireless can interfear with everything and everything can interfear with it.

      Fiber to the home is a long ways off, we need better faster backbones yet. Cable modems and DSL can go faster than the 1mBit that most are capped off at. They are capped because backbones bandwidth is still pretty expensive and untill prices come down from more avaible bandwidth we are not going to seem more than a few mbit to the home.

      That said, you will see it in new subdivisions and apartment buildings. Why lay copper and coax when you can just run fiber for the same cost. CPE may cost a little more.

      In the mean while wireless is a great way for us Geeks to connect up.

      --
      God, root, what is the difference?
  7. Very cool by Kushy · · Score: 2, Funny

    Now I can transfer gigs of p0rn from my server in my home office to my laptop in my bedroom quicker, for when it is really needed.

    --
    "The word "genius" isn't applicable in football. A genius is a guy like Norman Einstein," - Joe Theisman
  8. Helps Apps by Doesn't_Comment_Code · · Score: 2, Insightful

    There are a ton of applications out there (some good, some bad) that require high band width to operate. I'm personally intersted in piping virtual reality environments to other computers over the internet. But most of these new ideas never come to full fruition because few people have high bandwidth.

    When I make a webpage, I make it for someone with dialup so everyone can see it. I even have dialup.

    I know many people are changing to DSL/Cable. But the adoption of new bandwidth-hungry applications is really lagging because most people can't handle them.

    We would sure get a big boost if we could impliment much higher speeds over already existing infrastructure. That would allow a lot of applications that are already out there to be used.

    --

    Slashdot Syndrome: the sudden, extreme urge to correct someone in order to validate one's self.
  9. Great! Now my neighbors... by flinxmeister · · Score: 2, Funny

    Great! Now my neighbors can flood the first hop router with adware and Paris Hilton DIVX' at fiber speeds!

    Might as well dial up.

  10. fiber to the home plans. by MisanthropicProgram · · Score: 2, Funny
    Yes! I've been having problems with regularity at home lately!

    What!! This is not what the poster meant! WTF do you mean!!! I'm stopped up here! Too much Atkins', ya know!!
    Hey! Help me here!!!

  11. EETimes article with more technical details by pm · · Score: 5, Informative

    The EETimes carried this same story with more technical details and a few criticisms as a cover story in the week's paper edition. It's also available online here at the EEtimes website.

  12. traditional simpsons quote by AnonymousCowheart · · Score: 3, Funny

    Nerd 1: "Now you can download porn 500 times faster"
    Marge: "Does anyone need that much porn?"
    Homer: (drooling) "aghghghghghgh 500 times faster"

  13. roadrunner does this to me too by JeanBaptiste · · Score: 2, Insightful

    easy enough to get around, set your http server to use a different port.

    I use 8124, and its simple enough to use with DNS, just tell your domain name provider to use http://12.34.56.78:8124 instead of just http://12.34.56.78

    i guess that keeps some bots from visiting you, but oh well, and in my case i dont necessarily want them...

    cheers

  14. This is a mixed blessing. by blcamp · · Score: 2, Interesting


    I'm happy at the prospect of fatter pipes, but... ...will it mean improved QOS for my connection? ...will it mean more spam, pr0n, worms, et al? ...will it mean more transparent (less detectable) spyware stealing my bandwidth? ...will it mean I really pay less, long-term, for my fatter pipe... or will it simply make it cheaper for the bandwidth to be delivered, thus providing only a better margin for my ISP? ...will it mean EVERYONE will bombard each other with more information overload, thus precipitating network brown- and black-outs? ...will it lead to another dot-com goldrush and flame-out?

    I wish I had a time machine...

    --
    The problem with socialism is that they always run out of other people's money. - Margaret Thatcher
  15. Re:The company slogan... by spellraiser · · Score: 2

    With 10gb over copper... All your pr0n are belong to us!!

    Not unless you're connected to an intranet with massive amounts of pr0n lying around you won't. CAT5 is used in LANs, is it not?

    Oh, and by the way... stop using AYB references. They give me rashes.

    --
    I hear there's rumors on the Slashdots
  16. Just use DWDM! Re:Bandwidth available?? by bonnyman · · Score: 2, Informative

    "The current technologies are still pretty much limited at 40Gb/s for one single fiber."

    That's true, so then you deploy DWDM (dense wavelength division multiplexing) to multiplex 50 or 100 (or more) wavelengths of light, each carrying 10 or 40 Gb/s in traffic.

    Add to that all the dark (unused) fiber deployed in long haul terrestrial networks in the U.S. and we have a lot of backbone fiber capacity. Typical fiber counts on the long-haul cables deployed in the late 1990s were 144 to 288 fibers or more.

  17. This keeps getting rehashed. by FreeLinux · · Score: 5, Informative

    10Gbps over copper was done, over limited distances, by Nortel three years ago. It's not new. In fact they are working with 40Gbps now, though not over copper, yet.

    The technology ofr literally blistering speed is already available and hass been for some time. Additionally, it is not that expessive, relatively speaking, to offer speed that are significantly higher than todays broadband offerings. But, people keep bringing up the fibre to the home story and this is where the whole thing falls apart.

    While new developments may indeed get fibre to the home but, no provider is going to "rewire". If they already have copper in the ground they are not going to upgrade. Why? Because of the cost.

    Providers are already getting top dollar providing anything from 128Kbps (sometimes less) to 2Mbps. There is no incentive for them to make the massive capital outlay needed to bury fibre on routes that are already served by copper. It is unlikely that their customers will pay $100 per month versus the $50 that the providers already get for broadband so, there is no real demand to motivate the providers. Even new services like video on demand work adequately well over copper to negate the need for revamping the infrastructure.

    No, providers will continue to offer the same services over their copper infrastructure and when things become saturated they will start to penalize people that use it the most. This is already happening with Comcast and AT&T.

    1. Re:This keeps getting rehashed. by Joe5678 · · Score: 2, Insightful

      No incentive? What about the company that does it, and offers it for $50 a month, and then steals ALL of the other companies subscribers?

      You underestimate corporate greed; any opportunity to steal subscribers from other companies will be taken as soon as it becomes viable.

  18. Feasible, but where's the market? by Fringe · · Score: 2, Interesting

    Yeah, they've shown that they can get much more bandwidth out of our wires. The bounds of Moores Law and related "theoretical limits" fall every few years. But the problem with this particular solution is that we have a huge entrenched market and severe commodity pressure on broadband already.

    Maybe a new killer app will come along, but what companies are STILL rich from laying the old copper or even optic pipes? Most of them got sold off at a huge loss. Who made bucks beaucoup off of VoIP? It's heavily used, even when you don't know it, but that's the point - it became a commodity and you never even know you're using it.
    This is probably going to suffer the same problem - it requires an end-user actually pay some attention, install new hardware (not that it's a big deal, but it is for most people) and for an increase that they currently won't care about. It's a bigger win for the trunks, but I bet early adopters will wind up with more arrows in their backs.

  19. "overclocking" Cat5 by mrg123 · · Score: 3, Informative

    Check out this eetimes article for a little more detail than the article in eWeek:

    http://www.eetimes.com/showArticle.jhtml?article ID=18401022

    Understandably, the companies that manufacture the cable aren't enthusiastic about SolarFlare's technology, as they would prefer that everyone rewire with Cat6 or better to do 10Gig. They claim that SolarFlare is "overclocking" the cable (my own words), and that some installed Cat5 will work at 10 Gig and some won't. Cat5 is tested to 100 MHz; SolarFlare claims they can do 10G with 350 to 400 MHz of bandwidth and that Cat5 really supports this bandwidth. The cable manufacturers just need to test their Cat5 to this higher frequency.

  20. The killer app for many FTTH builds already exists by bonnyman · · Score: 2, Interesting

    The "killer app" for many FTTH projects is -- get this -- responsive, locally-based, reliable service.

    U.S. municipal power utilities are currently building FTTH networks to serve 100,000s of customers.

    Most of these are built in small towns that have endured wretched service from their incumbent telephone and cable TV incumbents. Local residents want an alternative and turn to local government.

    For a decade, small towns have successfully built and operated cable TV systems using HFC (hybrid fiber coax) technology.

    By about a year ago, FTTH costs had dropped low enough to make it actually cheaper for a power utility to run ADSS fiber cable than coax. So these FTTH projects are just an extension of a trend that's been going on for years.

  21. 10Gbps over Cat5e by GabeK · · Score: 2, Funny

    Max cable length between nodes: 17 inches.

    --

    [sig] 10 + 10 = 100 [/sig]
  22. Re:Too good 2 be true by NerveGas · · Score: 2, Interesting


    You have to be careful with that. Remember, most homes already have a connection that could make 100 mbit look like child's play: A cable television connection. There's an awfully large amount of bandwidth there, it's just used for something other than data.

    Getting a 100 (or 1000) mbit connection into your home doesn't mean that you'll get a 100-mbit connection to the Internet. It just means that you *can* get whatever connection to the Internet you want, and that you can also get phone, video, and perhaps other services over the same connection.

    steve

    --
    Oh, you're not stuck, you're just unable to let go of the onion rings.
  23. see also wireless data-transfer world record by i4u · · Score: 2, Informative
  24. Have you considered using bittorrent? by way2trivial · · Score: 2, Funny

    when I have a large file to move to different computers in my home network, I always first create a tracker for local use, and then copy it to all my computers.. the best thing is the decreased load on the original PC!
    you should see my share ratios! it's just ever so much more efficient!

    --
    every day http://en.wikipedia.org/wiki/Special:Random
  25. This is still dependent on local carrier's.... by jav1231 · · Score: 2, Insightful

    infrastructure that may still be outdated. My Mom lives in rural FL and can't get DSL because of the type of loop she's on. Yet, she's well within range of the nearest switch. :/ Those that need a solution are in rural areas (okay, so arguably does my Mom need 10G?) but they are also least populated.

  26. Re:Screw fiber to the home! by WormholeFiend · · Score: 2, Funny

    "Give me fiber to the business!"

    My internet spa^H^H mass-marketing company will be very happy to provide your business with crates and crates of cheap Metamucil at a very affordable price.

    Garanteed to increase your employee's regularity speed.
    -

  27. Shut up about the last mile! by Wesley+Felter · · Score: 4, Insightful

    This article is about Cat5 cable. The last mile does not use Cat5 cable, so this article has nothing to do with getting a faster connection into your house. Let's mod all the "gee, I can download pr0n faster" comments as offtopic and get on with the real discussion about whether our processors are fast enough to drive 10Gbps.

  28. Here is a thought by MadWicKdWire · · Score: 2, Interesting

    I seem to have a hard time thinking about this. Lets say you DO get this uber phat pipe of 1gb or even 10gb. What data are you going to fill the pipe up with even if you can use it to 100%? The hard drive speeds of today can't even keep up with 1gb ethernet. Unless you are caching all the porn you can download in RAM, I doubt your computer will have the ability to actually save all the data you are downloading at that rate. Has anybody even thought about this yet?

    --
    Sig (appended to the end of comments you post, 120 chars)... oops
  29. Distance on 10gbit cat5e copper by detain · · Score: 2, Insightful

    As the distance going from 100mbit to 1gbit over copper dropped, how is the distance going to 10gbit over copper going to be affected. If the distance is going to be lessened it doesnt seem very practical.

    --
    http://interserver.net/
  30. Coax has plenty of bandwidth. Why switch to fiber? by muskr · · Score: 2, Interesting

    With the abundance of bandwidth available on cable, I don't think we'll need to switch to fiber to the home any time soon. This may be interesting as a replacement for T1 Lines to businesses and such, but nobody is going to pay the huge expense of running fiber to a neighborhood for at least another 5 years.

    There are other significant expenses apart from packaging related to making fiber-optic NICs compatible with long-haul or telecom systems. It's great that packaging may get cheaper, but that's only part of the expense. It's still not cheap to make a fast, high-power 1.55 or 1.3 micron laser. Also, Laser output power changes (a lot!) as temperature changes, so a package to drive a telecom laser requires an integrated photodetector and feed-back circuit to keep the output power somewhat constant.

    Finally, if you're going to make things reasonably cheap (say by using WDM to multiplex several neighbors onto a single pair of fibers), you'll need each neighbor's NIC operate on a specific, narrow wavelength. This makes the price of the laser even more expensive (since conventional semiconductor laser wavelength changes significantly with temperature). This requires closely temperature-controled packaging or use of a less temperature-dependent semiconductor heterostructure for the active region of the lasers (such as quantum-dots).

    Basically, we're not going to see these in the _home_ any time soon. Maybe in the office or as a back-bone for local DSL connections.

  31. Jumbo frames? by spinkham · · Score: 3, Insightful

    Perhaps in the upcoming standarization they will finally switch to so called "jumbo frames", aka raise the maximum amount of data that can be sent in one chunk. As the singaling rate has gone up from 10Mb-1Gb, there has been a 100x increase in signaling rate and therefore a 100x decrease in the amount of time it takes one packet to cross the network. Since we are still using the same paltry sizes, cpu usage goes way up and throughput is somewhat capped. Switching to a larger frame size would allow higher throughput and lower CPU utilization. Many networking vendors have started adding support for larger frame sizes into their products for these reasons, but being added to the official standard would greatly increase the adoption of such jumbo frames.
    For more info, see:
    http://sd.wareonearth.com/~phil/jumbo.html
    http://www.psc.edu/~mathis/MTU/
    http://www.nwfusion.com/columnists/2004/0105tolly. htm

    --
    Blessed are the pessimists, for they have made backups.