>> Sorry, no frequencies to play with on Ethernet. Ethernet is a baseband >> technology (i.e. DC voltage, not AC frequencies) One pair is >> transmitting, one pair is receiving in gigE. If you want to use both > >pairs in the same direction to double up the bandwidth, that could be > >done but it would not be Ethernet anymore. If you want to talk both > >ways on the same pair, that is half duplex, we've left that idea in > >the dust years ago. S
>I don't mean to argue, as I am by no means an expert, but I'm pretty sure that >1000Base-T is 4 pairs bidirectional. Wikipedia may have lied to me, though. My >>presumption is that anything supporting bidirectional communication on shared >media can somehow shift that communication from symmetric to asymmetric >>dynamically. No you are correct that when you are talking about 1000Base-T you are talking about four pairs bidirectionally which is a departure from 10 and 100 mbps Ethernet. That does not change the fact though that it is a baseband technology. You can't dynamically change that and still call it Ethernet. You are free to invent a new standard but it would be hard to do that given that 10G is available for those feeling pain at 1G. Steven Naslund Chicago IL
