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Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender

Cross-posted to 3 groups.

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DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> wrote:
>On Sun, 9 Mar 2014 02:49:00 +0000 (UTC), Bit Twister
><BitTwister@mouse-potato.com> Gave us:
>
>>On Sat, 8 Mar 2014 10:58:10 -0800, Liam O'Connor wrote:
>>>
>>> Oh? I am very confused by these wiring "standards".
>>>
>>> I realize that what *really* matters most is that whatever
>>> color is used on one end, is used on the other end (since
>>> a wire is a wire, no matter what color it is insulated).
>>
>>Up to a point. You do not want to split the wire pair. That can cause
>>60 hz hum and/or cross talk. Pairs are twisted to reduce external emi.
>>
>>For anyone interested what the color pairs are for different plugs:
>>http://en.wikipedia.org/wiki/Registered_jack#Powered_version_of_RJ11
>
>  NOT "up to a point".  The actual wire pair used on each numbered pair
>DOES matter.

The original concept was Pair 1 on pins 4/5, Pair 2 on pins 3/6,
Pair 3 on pins 2/7 and Pair 4 on pins 1/8.  That works fine,
just as stated, "up to a point"!  For voice frequency or low
speed data... but the distance between pins on the plug for
Pairs 3 and 4 is too great for high speed data.

At high bit rates the intention is to keep the Tip and Ring of
each pair closer together than worst case.

Hence pins 1/2 are a pair and pins 7/8 are a pair to maintain
physical proximity on the plug.  The significance is the length
of conductor that is not twisted with it's mate.  Higher
frequency data requires a higher twist rate, but the physical
construction of the plug means there is about 9/16" more with no
twist.  If the conductors are parallel to each other spaced only
by the insulation that short distance matters less than if they
are further separated.  When they are 3/8" apart the effect is
of two independant wires in space, rather than a parallel
transmission line or twisted pair transmission line.

The T568A/B standards use the pairs on pins 1/2 and 3/6.  Up to
a point that is close enough proximity, but it isn't the best
that could be done with that physical socket/plug either.

All that said, for the use described by the OP, it makes no
difference in practice!  I doubt that even Gigabit EtherNet
would blink at different pin spacing of pairs in a typical
environment.  When the connection is to a 6 foot rack with
nothing but jack fields and cables, it counts. Not in a home
environment with only minor potential for crosstalk.
                  
-- 
Floyd L. Davidson                         http://www.apaflo.com/
Ukpeagvik (Barrow, Alaska)                      floyd@apaflo.com

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How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 00:53 -0800
  Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 07:46 -0500
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:56 -0800
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:58 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 11:51 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 15:25 -0500
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Scott Hemphill <hemphill@hemphills.net> - 2014-03-08 21:07 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Scott Hemphill <hemphill@hemphills.net> - 2014-03-08 21:18 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:49 -0800
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Mark Lloyd <mark@this.is.not.email.invalid> - 2014-03-09 10:50 -0500
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Bit Twister <BitTwister@mouse-potato.com> - 2014-03-09 02:49 +0000
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:51 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-08 23:56 -0900
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 09:39 -0700
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 11:07 -0800
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-08 23:20 -0900
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-09 07:40 -0700
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-09 21:19 -0400
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 09:21 -0700
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 10:57 -0800
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-09 16:07 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-09 17:05 -0800
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-10 10:40 -0700
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-10 12:06 -0800
              Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-10 20:07 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 02:36 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-11 19:30 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 23:13 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-12 21:30 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 04:44 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 20:20 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 20:30 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 22:59 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-14 11:31 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:50 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 04:31 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-14 13:45 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 07:26 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender John Hasler <jhasler@newsguy.com> - 2014-03-14 11:07 -0500
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 10:23 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 22:02 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-14 21:53 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 09:49 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender mechanic <mechanic@example.net> - 2014-03-15 10:45 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 09:57 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 12:28 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 14:02 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 14:22 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-15 21:55 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-15 21:25 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:54 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-14 21:58 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-11 19:33 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-11 23:36 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender ceed <ceed@is.indeed.invalid> - 2014-03-12 17:05 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-12 21:48 -0700
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-13 04:46 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Eef Hartman <E.J.M.Hartman@tudelft.nl> - 2014-03-12 19:27 +0000
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender floyd@apaflo.com (Floyd L. Davidson) - 2014-03-12 13:32 -0800
                Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-13 19:18 -0700
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 10:59 -0800
    Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 11:01 -0800
      Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-08 15:36 -0500
        Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-08 19:06 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2014-03-08 20:54 -0800
          Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Dan Purgert <dan@djph.net> - 2014-03-09 08:03 -0400
            Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Liam O'Connor <liamoconnor@example.com> - 2014-03-09 07:56 -0700
  Re: How to set up a spare Linksys WRT54Gv2 as a wired access point network extender Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> - 2014-03-08 17:42 -0800

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