* Copied from: SAVEAREA
Hullo Mike Bilow, hope you are having a nice day!!
11-Dec-97 23:01:50, Mike Bilow wrote to Fernando Ariel Gont
          Subject: Protocols, configurations, and so on .....
 MB> Let's say that each card puts a 1 volt DC bias on its signal.
 MB> Then, by measuring the average DC bias, you can deduce how many
 MB> cards are transmitting simultaneously.  If a transmitting card
But ... how many cards can transmit simultaneously? Only one, can't it?
So if each card put 1 volt DC bias, and not taking into account the
colision moment, there's no more voltage in the line than 1 volt DC,
is there?
 FAG>> Two machines were waiting for the carrior to get free. The line
 FAG>> becomes free, and both machines notice it at the same time. They
 FAG>> both try to send their packets, but at the same time!
 MB> Right.  They use the DC bias measurement to detect this.  The
 MB> frame is lost anyway, but the time the cable is unavailable is
 MB> minimized  -- Mike
Aha... But why do the cards keep sensing the carrior?
Wouldn't the cards that try to use the line after the first one has
started, detect it instead of having to have the first card that used
the line keeping sensing the carrior?
Once again, thank you very much, Mike!! :)
 -=> Yours sincerely, Fernando Ariel Gont <=-
e-mail: FGont@siscor.bibnal.edu.ar
e-mail "Good Stuff!" _*Magazine*_ : gstuff@siscor.bibnal.edu.ar
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