Re: Ethernet Line Tuning

[Larry Bolhuis <lbolhuis@xxxxxxxxxx>]

Slight correction: 10 and 100Mb will operate happily *HALF or *FULL on only
two pairs. Clearly bad cable can preclude the use of 100Mb speeds but if the
cable works at *HALF it will work for *FULL duplex. If you intend to go to
1000Mb (1Gb) then you will need ALL FOUR pairs correctly wired and you WILL
need cat5 or better wire.

Chris is right that basic cable testers don't test for duplex because they
don't actually communicate with the switch or hub, they just test the wire.

   - Larry

Chris Bipes wrote:

> Most likely the cable test good at half duplex but not full duplex.  Must be
> cat 5 or better with all 4 pairs wired correctly.  Standard cable testers
> will not check the 100 full duplex.  Check out your cable tester to see if
> it has that capacity.

--
Larry Bolhuis           | IBM Certified Solutions Expert
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Arbor Solutions, Inc.   |     e-business for AS/400 V4 R2
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