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single mode fibre optic

Discussion in 'A+' started by klospros, Jan 28, 2007.

  1. klospros

    klospros Nibble Poster

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    As single mode fibre optic is one way, im I right in thinking its only half duplex or is it full duplex
     
    Certifications: A+ 2006, MCP, MCDST
    WIP: MCSE
  2. MrNice

    MrNice Kilobyte Poster

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    I would say its half duplex as full duplex is 2 way. That is a guess however.
     
  3. r.h.lee

    r.h.lee Gigabyte Poster

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    klospros,

    The key words are "single mode." That means each fiber optic cable carries a single signal. Therefore with two single mode fiber optic cables, you can get full duplex performance, one cable carrying the signal one way and the other cable carrying the signal the other way.

    To complete the lesson, think of "multimode" like "multi-purpose." That is, the same cable carries signals both ways because it is multi-purpose. Just like a single lane road can let car traffic in one way at a time, therefore multimode fiber optic is the one that should be half duplex, unless there's a dedicated upstream multimode channel and a dedicated downstream multimode channel.

    I hope this helps.
     
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  4. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    Er - <cough> this is wrong. AFAIK *all* fibre connections are single way - so there are always two fibres in a link.

    Multimode means that the way a beam goes down a fibre is more chaotic. See info here.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
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  5. MrNice

    MrNice Kilobyte Poster

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    so to answer the dudes question is it half or full duplex Harry? :eek:
     
  6. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

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    Both single and multimode fiber is half-duplex. This is why there would be two fiber cables in a single link.
     
    Certifications: A+ and Network+
  7. klospros

    klospros Nibble Poster

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    Thanks for the help everyone:)
     
    Certifications: A+ 2006, MCP, MCDST
    WIP: MCSE

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