[GreenKeys] Interface Standards History

[Sam Hallas]

Don Robert House wrote:
>  RS-232 was a Rural Electrification Act Standard... It was replaced by 
Electronics Industries Association EIA-232D at
>  some point.  The latest version of the standard is EIA-232F

Thanks, Don. The corresponding International Standards are V24 and V28 
defining the signal voltage and the pin functions.

I think some Greeenkeyers were thinking that RS232 defiined more than it 
actually does. Things such as number of bits, speed (baud rate), and 
protocol are not part of the interface. It's much more basic than that - 
just a hardware definition.

Cheers,
Sam