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Date:      Mon, 5 Aug 1996 18:11:10 -0500 (CDT)
From:      Tony Kimball <alk@think.com>
To:        100626.3506@CompuServe.COM
Cc:        dfr@render.com, hackers@freebsd.org
Subject:   100BASE-TX hubs
Message-ID:  <199608052311.SAA26259@compound.Think.COM>

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  Also: Don't forget that if you go with a certain brand you better buy everything
  of that brand. I for instance refuse to use HP with Intel or 3Com. 

That makes excellent sense since your HP equipment is 100VG, while the
Intel and 3Com equipment is 100TX.  

  Regarding the
  words of the Intel people these 100 Mb things are going to be different for some
  time. 

Most folks seem to have no problems using arbitrary vendor 100TX
end-station and hub equipment, mix-n-match.

  For 100 Mb you NEED a HUB.

Well...
: The trick in is that from your end station talking to a hub your wires
: 1 and 2 do the transmitting from the end station to the hub, and wires
: 3 and 6 do the transmitting from the hub to the end station.  If you
: wish to go from end station to end station with no hub, then you need
: to flip pair 1 (wires 1 and 2) with pair 2 (wires 3 and 6) at one of
: your RJ jacks.  This will result in this situation:

: End Station : Transmit ---------------------- Receive  : End Station
:     #1      : Receive  ---------------------- Transmit :    #2





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