Cat5 cable used as serial cable.

Discussion in 'Windows Networking' started by pmg, Jul 21, 2003.

  1. pmg

    pmg Guest

    This is a strange one. I have a Windows network and want to attach a
    peripheral to it that normally attaches to a pc via a serial interface. The
    peripheral is too far from the server to run a serial cable accross the
    floor but there is a spare cat 5 cable that runs through the walls from
    beside the peripheral to the cabinet that houses the server (used to be a pc
    on the network). Is it possible to make up two adaptor cables that will
    allow me to connect the peripheral to the cat5 cable and the server's serial
    port to the other end of the cat5 cable. I know it is physically possible to
    make a cable, but I wasn't sure if cat5 cable (about 20 metres) is suitable
    to be used for serial transmission. The peripheral rarely sends data and
    doesn't send much when it does.

    pmg, Jul 21, 2003
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  2. Is it possible? Sure. Will it work? Probably not. The reason that serial
    and parallel cables have a maximum length is because their signal tends to
    degrade when the cable length is exceeded.
    Richard G. Harper [MVP Win9x], Jul 21, 2003
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  3. pmg

    CJT Guest

    I think it will work. 20 meters is almost nothing for serial transmission.

    To what "maximum length" are you referring???
    CJT, Jul 21, 2003
  4. Richard G. Harper [MVP Win9x], Jul 21, 2003
  5. pmg

    CJT Guest

    CJT, Jul 22, 2003
  6. That's highly interesting, though it doesn't seem to be current. It makes
    no mention of nine pin cables, for example.
    Richard G. Harper [MVP Win9x], Jul 22, 2003
  7. pmg

    dj.forest Guest

    I remember PC/AT comming out, but not underclocked part, missed that or
    don't remember. Think i spent more time shortly after that looking at the
    almost compatable clones, and deciding if it was worth getting a Whole extra
    1meg of memory, LOL


    dj.forest, Jul 22, 2003
  8. Yeah, the first PC/ATs came with the 80286-8 chip running at 6mHz in IBM
    boxes but the clone manufacturers added extra fans and pumped them all the
    way up to their rated 8mHz clock speed. There were a slew of articles about
    how to un-solder the clock crystal from the motherboard and replace it with
    a faster one to run at 8mHz. I believe Radio Shack had the exact part in
    stock. :)

    Boy those were the days. <VBG>

    Richard G. Harper [MVP Win9x], Jul 22, 2003
  9. pmg

    Dave Mundt Guest

    Greetings and salutations...

    this is true, but, depending on the circumstances, that
    can be extended QUITE a bit. I had one installation where a POS
    (that is Point Of the by) terminal from NCR was attached
    through a serial line to a "server" system in the computer room.
    The total line length was close to 90 feet or so. Of course,
    we used very good quality cable, shielded properly and run
    as far away from electrical interference as possible. Also, we
    ran the link at 1200 baud for much of its life. We did get up
    to 9600 baud, finally, but, it was only after a couple of
    hardware upgrades.
    The best thing to do is try it...there may come a point
    where you get decent communications, and if that is fast enough,
    then use it.
    Dave Mundt
    Dave Mundt, Aug 16, 2003
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