When BT do FTTC ?

Discussion in 'Broadband' started by David, Jul 28, 2010.

  1. oh yes if the last few yards are COPPER.

    I thought the question was 'fibre all the way down'
    The Natural Philosopher, Jul 29, 2010
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  2. :)

    So it wasn't fucked by pole climbing sheep then?
    The Natural Philosopher, Jul 29, 2010
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  3. David

    Graham. Guest

    ADSL sent down fibre? That can't be correct.
    Not sure what it would be, ATM I think.
    Graham., Jul 30, 2010
  4. Don't they still need the copper pair to the exchange for the POTS bearer?


    Denis McMahon
    Denis McMahon, Jul 30, 2010
  5. Don't need to. FTTC street cabs are powered by permanent feeds from the
    electric cables. They also have batteries.

    Ericsson first shipped street cabs for UK POTS with fibre links to the
    exchange in about '96. I was present when the first one was installed.

    Google satellite suggests it's been removed.


    Denis McMahon
    Denis McMahon, Jul 30, 2010
  6. David

    PeterC Guest

    Or cows, in MK.
    PeterC, Jul 30, 2010
  7. That would be pole DANCING cows, in MK, surely ;-)
    The Natural Philosopher, Jul 30, 2010
  8. David

    Petert Guest

    No, the heading of the thread is "When BT do FTTC"
    Petert, Jul 30, 2010
  9. David

    Petert Guest

    Almost definitely - no reason to recover it, the cost of burying it
    would be eyewatering
    Did you mean STC?

    My experience tells me the most popular way to damage a sub cable is
    either by trawl or by anchor
    Petert, Jul 30, 2010
  10. David

    Petert Guest

    The cost of installing the large capacity copper cables will have been
    recovered/written off many years ago
    Petert, Jul 30, 2010
  11. Not at the bottom of the atlantic ..1000 meters down..
    The Natural Philosopher, Jul 30, 2010
  12. the cost of installing the FIBRE.

    Have you ever terminated a fibre, or a bunch of fibres?

    Or looked at the cost of the kit that you plug it into?

    Not sure what BT will run down their fibers, but you can only get about
    8GBPS in one colour down a fibre, That's 100 subscribers at 80 MBps. 400
    subscribers at 20Mbps, if you aren't going to have some kind of
    potential peak bandwidth throttling problems. And 8GBPS stuff is not
    cheap either.And you had better double all that in case a fibre goes down.

    I am guessing at up to £50,000 to put maybe 200 subscribers onto fibre.
    That's a lot of scrap copper!
    The Natural Philosopher, Jul 30, 2010
  13. David

    Petert Guest

    The average depth of the Atlantic is about 3600 metres, it's deepest
    point is around 8500 metres. No sharkbite cable needed at these
    depths. About the only cause of damage in the deep bits is chaffing.

    Apparently, where shark bite is a problem it is thought they are
    attracted to the electrical field found around the cable
    Petert, Jul 30, 2010
  14. David

    Petert Guest

    The cost of installing a fibre is probably cheaper than the cost of
    installing a copper pair or co-ax cable
    Oh yes, many
    Yes, the cost falls sunstantially every year - the cost/bit is now
    probably too small to measure
    I think you may be looking at out of date data. I'm sitting a few feet
    from a few optical line systems - one of them is carrying 32 10G
    channels on 1 fibre pair, the other is lightly loaded and only has
    about a dozen 10G's on it.

    Projects are on-going to bring into service kit that will carry 96 40G
    channels on a pair
    I think your 50K estimate may be a little way out
    Petert, Jul 30, 2010
  15. ISTM you are probably right :)

    That is quite impressive. I knew it had gone up since I last looked, but
    not that much,.

    So what would you think?

    To just field a small team in a van is £1000 a day.

    I dunno what the termination stuff is, I am guessing at 20k each end.
    The Natural Philosopher, Jul 30, 2010
  16. That could be it. we ran power to the repeaters we were building as well
    as the optics. It was many years ago. 1987 or there abouts.
    The Natural Philosopher, Jul 30, 2010
  17. David

    Petert Guest

    It seems a cable between two of the Canary Islands was in suspension
    and it was that that provided the electrical field to the shark. It
    seems it left a tooth embedded in the cable
    Petert, Jul 30, 2010
  18. David

    Petert Guest

    Someone is trialling 100GB
    Absolutley no idea
    For a jointer and a mate?
    You can purchase preterminated cables, not sure if they are available
    for external cables.

    I wouldn't imagine it was more than a days work to terminte a 96F
    cable (one end)

    I'm not well up on ADSL, and struggle abit to understand waht gigabit
    ethernet is (much to the amusement of my son), but I do know you can't
    equate ADSL with the trunk capacity I work with
    Petert, Jul 30, 2010
  19. David

    Petert Guest

    I knew me being right wouldn't last :-(
    Petert, Jul 30, 2010
  20. that sounds like the origin of the urban myth,. nice to clear it up
    after all these years!
    The Natural Philosopher, Jul 30, 2010
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