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Posted by Rick Jones on March 15, 2007, 5:23 pm
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> little question, that does not find it's answer in google (no matter
> of what angle I strike it) - in 100BASE-TX, autonegotiation function
> is placed just before the RJ-45 (MDI), under the PMD (physical
> medium dependent - at the bottom of PHY), and then - in 1000BASE-T
> it is defined as a functional block of PCS (physical coding sublayer
> - at the top of PHY).
> Simple q: W H Y ? ? ?
I'm not sure it is an/the answer, but autoneg in 100BT was (at least
initially) optional. I don't think it was ever optional in 1000BT.
Perhaps that has something to do with where it is placed? I suspect
the folks over in comp.dcom.lans.ethernet would know.
rick jones
--
Wisdom Teeth are impacted, people are affected by the effects of events.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
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