Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
Networking Communications

BT and Alcatel-Lucent Record Real-World Fibre Optic Speed of 1.4Tbps In the UK 70

Mark.JUK writes "The United Kingdom's national telecoms operator, BT, has successfully teamed up with Alcatel-Lucent to conduct a field trial that delivered real-world data speeds of 1.4 Terabits per second over an existing commercial-grade 410km fiber optic link. The trial used a 'record spectral efficiency' of 5.7 bits per second per Hertz and Flexgrid technology to vary the gaps between transmission channels for 42.5% greater data transmission efficiency than today's standard networks. The speed was achieved by overlaying an 'Alien Super Channel' (i.e. it operates transparently on top of BT's existing optical network), which bundled together 7 x 200Gbps (Gigabits per second) channels and then reduced the 'spectral spacing' between the channels from 50GHz to 35GHz using the 400Gb/s Photonic Services Engine (PSE) technology on the 1830 Photonic Service Switch (PSS). It's hoped that this could help boost capacity to those who need it without needing to lay expensive new fiber cables."
This discussion has been archived. No new comments can be posted.

BT and Alcatel-Lucent Record Real-World Fibre Optic Speed of 1.4Tbps In the UK

Comments Filter:
  • by Trepidity ( 597 ) <delirium-slashdot@NOsPam.hackish.org> on Tuesday January 21, 2014 @11:47AM (#46025441)

    That's about 875 micro-library-of-congresses per second, assuming 600 dpi [loc.gov] LOC digitization. Getting close to breaking the coveted milli-LOC/s barrier!

    • Ya, but how many football fields is that?
    • by Kjella ( 173770 )

      Everyone who uses standard units knows it's just over 1 kLOC/fortnight, don't go all SI on us.

    • Let's see, the summary contains: 1) the bit rate 2) the link length 3) the bit rate per Hz and 4) the percentage improvement over what they were using before.

      What is it you're complaining about, exactly? Or is this just a pavlovian response to any story about bandwidth?

      • by fisted ( 2295862 )
        While the summary contains all that, GP's comment additionally contains the "joke", while your comment contains some "miss", qualifying it "whoosh".
  • Did Gene Roddenberry get the naming rights to all of the equipment ?
  • Just wait.. (Score:5, Insightful)

    by Gaygirlie ( 1657131 ) <gaygirlie@[ ]mail.com ['hot' in gap]> on Tuesday January 21, 2014 @12:04PM (#46025695) Homepage

    Just you wait, they'll raise all speeds to that, but then slap a datacap of 500MB on it.

    • Do not worry my friend. Lots of other joint experiments are going on by companies to take it beyond the ever-elusive GB barrier.
    • No, no, no this is BRITISH Telecom. One of their engineers will draw up perfectly feasible and realisable plans for an even better version, management however won't be interested and so the plans will be left in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of the Leopard'. In the meantime some foreign competitor will eventually come to the same level fives years later and proceed to patent it six ways from Sunday and make £500 bazzilion from
    • Or worse block a big pile of the internet as they do in UK, you know to protect the children (you wouldn't want them pirating Myley Cirus...)

    • What the article doesn't mention: 1.4 tbs down, 10mbs up

    • What's a datacap?

  • , in LOCRiDS ( Library Of Congress Replacement Cost in DollarS ) , of one of those to my doorstep ?
  • The GHCQ and NSA thank you for filling their files faster.
  • If only they could have such speeds over wireless connections...

    I can't see people who live in areas that are hard for cable to reach benefitting much from this.

    • by Bengie ( 1121981 )
      That 2% of the population? Who cares? They know what they're giving up living in the middle of a 1000 acre forest. for the rest of a nation, even farmers, this is not an issue.
  • Once the government has finished fucking up [thinkbroadband.com] our Internet access completely.

  • Storage capacity (Score:5, Interesting)

    by StripedCow ( 776465 ) on Tuesday January 21, 2014 @12:56PM (#46026415)

    real-world data speeds of 1.4 Terabits per second over an existing commercial-grade 410km fiber optic link.

    Meaning the link can store only 1.4 Tb/s * 410km / c = 239 MB. (Where c is the speed of light in the fiber link).

    Bah, that's nothing.

    • by Bengie ( 1121981 )
      There is a 16tb/s connection that has a 680km range available right now and a 1tb/s link that was tested to have a 13,000km range and should be ready for real world soon. Those two have slightly better storage capacity. There is also the 1pb/s connect with 56km range, but that uses a special new type of fiber that is much more expensive and both will take a while to see real-world use.
    • There may be applications for that kind of storage with a unique capacity/throughput/latency combination.

  • Wikipedia says the record on an optic fiber is 101 Tbps [wikipedia.org]. How is this better?
    • by sjames ( 1099 )

      It was done on an existing commercial grade fiber. No need to lay new fiber.

In seeking the unattainable, simplicity only gets in the way. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982