Wilko Bulte wb at freebie.xs4all.nl
Sat Mar 5 09:56:04 GMT 2005

On Sat, Mar 05, 2005 at 10:52:09AM +0100, sthaug at nethelp.no wrote..
> > > In man pages, dmesg and ifconfig of FreeBSD5, GbE operation over
> > > twisted pair is mostly referred as '1000baseTX'.  I guess most of them
> > > should be replaced by '1000baseT'.  1000base"TX" and 1000base"T" are
> > > different standard and they are not compatible ("TX" needs CAT6 cable
> > > and uses pairs in different way).  Also 1000baseTX support is very
> > > rare yet.  I'm sorry I'm not sure if some devices really support "TX".
> > 
> > Do you have any documentation to back up this claim?
> 1000baseTX was an attempt at producing less expensive hardware (NICs
> etc) that could be used with Cat6 cabling. It is basically dead, and
> was never blessed by the IEEE.
> The IEEE is quite clear on the fact that Gigabit Ethernet on Cat5 UTP
> is called 1000Base-T. See for instance Chapter 34, "Introduction to
> 1000 Mb/s baseband network", in IEEE 802.3-2002, available from
> 	http://standards.ieee.org/getieee802/802.3.html
> So using 1000baseTX as the name in FreeBSD is clearly wrong.

Probably just as right or wrong as 99% of the NIC cards docs.

Next to every gigE card I have had my hands one mandated at least
CAT5e but generally preference was expressed for CAT6.

Wilko Bulte				wilko at FreeBSD.org

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