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Wireless Networks Thread, Networking between 2 buildings? in Technical; Fibre is better for your digestive system than catv?...
  1. #46
    Jake's Avatar
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    Re: Networking between 2 buildings?

    Fibre is better for your digestive system than catv?

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    Re: Networking between 2 buildings?

    As CyberNerd pointed out,

    faster speeds (>1GB/s if you can afford the transievers)
    more robust and secure
    takes less space and is lighter
    not affected by RF
    no crosstalk
    runs longer distance -low loss

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    Re: Networking between 2 buildings?

    its 10 m between the buildings it'll be alot more from the cabinet though depending on which one we go from it'll be quite a way for it to go and then to another cab in the new building definately fibre would be the way to go! gettin someone to come out and do a survey for us now so we'll see whether it is within the budget! if not it'll be time for the shovel!!!!!

  4. #49

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    Re: Networking between 2 buildings?

    Single core fibre is good up to 10Gbit. If you have multimode/multicore fibre, well you're a fool.

    Please someone give me a decent reason apart from fibre being used as a buzz word for not using Cat5.
    Ok, for the third time. Seperate buildings are not eletrically connected together. Therefore the ground in each building will have a different base voltage. If you connect these same two buildings up with Cat5 then the difference in voltage will cause an electrical current to flow between them down the ground wires in the Cat5. At best you will get noise on the line degrading speeds and connectivity, at worst you will cause an electrical fire.

    Fibre does not have this problem as glass is not conductive.

  5. #50
    Jake's Avatar
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    Re: Networking between 2 buildings?

    Quote Originally Posted by krisd32
    its 10 m between the buildings it'll be alot more from the cabinet though depending on which one we go from it'll be quite a way for it to go and then to another cab in the new building definately fibre would be the way to go! gettin someone to come out and do a survey for us now so we'll see whether it is within the budget! if not it'll be time for the shovel!!!!!
    If its not within the budget, what will your plan be? Would be interested to know what alternatives you come up with, if any. As budgets are our biggest constraint coming from an economically deprived area

  6. #51

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    Re: Networking between 2 buildings?

    Fibre does not auto sense speed and is more of a pain in the arse to upgrade than Cat5. Cat5 is not slower unless you pay to have top of the range fibre which I doubt a school could afford it.

    I have fibre here and am slowly replacing it with cat5. Best thing I ever did.
    We got ourselves a nice can or worms here.

    Whats the difference between a run of the mill fibre and a top of the range one then?

    I thought you installed the relevant type of fibre to do what you are needing i.e single mode or multi mode other than that I don't see a difference.

    Fibre can and does run at much higher speeds than cat5e.

    Yes you can run cat5e at gigabit but that's about. Have yours been tested to make sure they can run at that and pass the crosstalk etc... tests?

    I definately don't see the logic in spending money replacing fibre with cat5e.

    A proper installation of cat6 is going to be quite expensive as the specification for installing it is very stringent with bend radius and pulling load etc...

    My aversion to using cat5 for external links is that wonderful thing called lightning.

    All my external backbone links to other cabinets are fibre I have 2 internal gigabit copper links that will be relpaced with fibre next year.

    Ben

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    Re: Networking between 2 buildings?

    ANYWAY WHAT ABOUT A LASER LINK?

    Sorry for shouting but I've said it 3 times and no-one had a comment on it so I thought that may help.

    Ben

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    Re: Networking between 2 buildings?

    Havent ever even looked at a LASER LINK

    Whats the cost like involved in that? Its cost that interests me more than anything, which is why I wanted to know what people would arrange if fibre was out of budget. If we can just steer away from the all conquering microsof...I mean fibre, what are the recommendations for something cheaper? anything? nothing?

    If we had a LASER LINK...could I sit in a chair and say "Fire the LAZOR !" in a Dr Evil voice?

  9. #54

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    Re: Networking between 2 buildings?

    Laser links are not football or tree proof.

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    Re: Networking between 2 buildings?

    Quote Originally Posted by Geoff
    Ok, for the third time. Seperate buildings are not eletrically connected together. Therefore the ground in each building will have a different base voltage. If you connect these same two buildings up with Cat5 then the difference in voltage will cause an electrical current to flow between them down the ground wires in the Cat5. At best you will get noise on the line degrading speeds and connectivity, at worst you will cause an electrical fire.

    Fibre does not have this problem as glass is not conductive.
    All our main buildings are connected by fibre, as long as they have a switch in them, but the odd terrapin with only 1 or 2 points in them we have external cat5 going to them due to the fact its a lot cheaper.

    The terrapins are probably only a couple of metres away from the main buildings, but could we see the same problems with power?

    Would it be better to run fibre even to small single classroom terrapins?

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    Re: Networking between 2 buildings?

    @Jake: Have you tried asking any networking companies how they would do it given the budget constraints?

  12. #57

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    Re: Networking between 2 buildings?

    If you bolt a laser device to a suitable wall and provide a deflector plate underneath it then ball strikes shouldn't be a problem and make sure there are no trees in the way.

    Just trying to give him another option.

    Ben

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    Re: Networking between 2 buildings?

    If you connect these same two buildings up with Cat5 then the difference in voltage will cause an electrical current to flow between them down the ground wires in the Cat5. At best you will get noise on the line degrading speeds and connectivity, at worst you will cause an electrical fire.
    and probably a fair bit of corrosion

  14. #59
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    Re: Networking between 2 buildings?

    Quote Originally Posted by CyberNerd
    If you connect these same two buildings up with Cat5 then the difference in voltage will cause an electrical current to flow between them down the ground wires in the Cat5. At best you will get noise on the line degrading speeds and connectivity, at worst you will cause an electrical fire.
    and probably a fair bit of corrosion
    Nah, just run it through a hosepipe!

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    Re: Networking between 2 buildings?

    Quote Originally Posted by webman
    However, due to time constraints we get all of our structured cabling installed by a company called Conex.
    What time constraints you have made 1097 posts on at least 1 web forum since nov 2005 and you moan about time constraints

    External cat5 is solid core and shielding so as to not attract lightning.

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