Single RJ-45 with two NICs?

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  • your name
    #1

    Single RJ-45 with two NICs?

    Hello,

    When you look at a cat5e cable, it seems to have 4 pairs of twisted
    cable inside. Does that mean that a 100 Mbps NIC will use all 4 pairs of
    twisted cable or only 2-pairs? If it's only 2, then can I use the other
    2 pairs to run another NIC? If so, how?

    Thanks.
    Tags: None
    • Keith Thompson
      #2
      Re: Single RJ-45 with two NICs?

      your name <nospam@nospam. comwrites:
      When you look at a cat5e cable, it seems to have 4 pairs of twisted
      cable inside. Does that mean that a 100 Mbps NIC will use all 4 pairs
      of twisted cable or only 2-pairs? If it's only 2, then can I use the
      other 2 pairs to run another NIC? If so, how?
      This newsgroup discusses the C programming language. We can't help
      you with questions about network cables. Perhaps another newsgroup
      could, but I don't know which one.

      --
      Keith Thompson (The_Other_Keit h) <kst-u@mib.org>
      Nokia
      "We must do something. This is something. Therefore, we must do this."
      -- Antony Jay and Jonathan Lynn, "Yes Minister"

        Comment

        • Antoninus Twink
          #3
          Re: Single RJ-45 with two NICs?

          On 21 Apr 2008 at 14:03, your name wrote:
          When you look at a cat5e cable, it seems to have 4 pairs of twisted
          cable inside.
          Yes it does!
          Does that mean that a 100 Mbps NIC will use all 4 pairs of twisted
          cable or only 2-pairs?
          I believe that only 2 are used at 100Mbps. Gigabit ethernet uses all 4.

          I think originally there were 4 pairs so that both phone and data could
          run over the same cable (4 data wires, 4 voice wires). It does make
          sense to use all 8 for data.
          If it's only 2, then can I use the other 2 pairs to run another NIC?
          If so, how?
          Maybe if you modify your NIC and write a suitable driver for it... Why
          on earth would you want to? Just get a splitter.

            Comment

            • Walter Roberson
              #4
              Re: Single RJ-45 with two NICs?

              In article <87ve2bxlks.fsf @kvetch.smov.or g>,
              Keith Thompson <kst-u@mib.orgwrote:
              >your name <nospam@nospam. comwrites:
              >When you look at a cat5e cable, it seems to have 4 pairs of twisted
              >cable inside. Does that mean that a 100 Mbps NIC will use all 4 pairs
              >of twisted cable or only 2-pairs? If it's only 2, then can I use the
              >other 2 pairs to run another NIC? If so, how?
              >This newsgroup discusses the C programming language. We can't help
              >you with questions about network cables. Perhaps another newsgroup
              >could, but I don't know which one.
              comp.dcom.lans. ethernet
              --
              "No sincere artist was ever completely satisfied with his labour."
              -- Walter J. Phillips

                Comment

                • Walter Roberson
                  #5
                  Re: Single RJ-45 with two NICs?

                  In article <slrng0polk.j8h .nospam@nospam. invalid>,
                  Antoninus Twink <nospam@nospam. invalidwrote:
                  >On 21 Apr 2008 at 14:03, your name wrote:
                  >When you look at a cat5e cable, it seems to have 4 pairs of twisted
                  >cable inside.
                  >Does that mean that a 100 Mbps NIC will use all 4 pairs of twisted
                  >cable or only 2-pairs?
                  >I believe that only 2 are used at 100Mbps.
                  You forget 100Base-T4.
                  --
                  "We may gather out of history a policy, by the comparison and
                  application of other men's forepassed miseries with our own like
                  errors and ill deservings." -- Sir Walter Raleigh

                    Comment

                    • Antoninus Twink
                      #6
                      Re: Single RJ-45 with two NICs?

                      On 21 Apr 2008 at 19:25, Walter Roberson wrote:
                      In article <slrng0polk.j8h .nospam@nospam. invalid>,
                      Antoninus Twink <nospam@nospam. invalidwrote:
                      >>I believe that only 2 are used at 100Mbps.
                      >
                      You forget 100Base-T4.
                      Well, I did use the present tense :)

                      Ignoring products that bellyflopped, I believe that only...

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