Aucbvax.6524
fa.works
utcsrgv!utzoo!decvax!ucbvax!works
Mon Mar 15 20:49:18 1982
Re: Ethernet Doomed?
>From BILLW@Sri-Kl Thu Mar 11 15:47:10 1982
You are also wrong.  An ethernet tranceiver is a far cry from a
modem, and is a lot simpler, but it isnt quite pure digital.
I believe that EtherNet does colision detect by measuring the
DC level on the coax - If one person is using it, the dc level
is about X.  If two people are trying to transmit at once,
it deviates from X.  A tranceiver has to be pretty sneaky
since X will vary depending on how far away from this tranceiver
the station that is transmitting is. A person from MIT recently
gave a talk at Stanford advocating ringnets over ethernets for
this (simplified analog electronics), amoung other reasons...

Bill W




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