Thank all.
I "discovered" that RS232x (x = {A, B..., F} ) are
releases of the same protocol. All are +-12V
ground referenced.
I'd like to know what is the improvement
added in RS232C ?
I am not shure, but it is something like
* Accept hier baud
* Another kind of parity
*...
I don'k know what is, and this is what I
would like to know.

Thank
Augusto de Conto

> You are either drunk, forgot the ;)) or working very late, because this
> is total bullshit (and I'm not even Olinising). RS232 is a common name
> for RS232x, or sometimes for the original RS232. All RS232's use
> unipolar (ground referenced) voltages, not currents.
>
> Wouter van Ooijen

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