Re: LF: A 9600 bps Note!
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28.8K and 14.4K are the number of bits a modem can transfer per
second. They have nothing to do with compression. A 28.8K modem can
theoretically transferr up to 115K using it's own hardware
compression. The differences in the modems are in the protocols the
modems use. 14.4K modems use a v.32 protocol or something like that
and the 28.8K uses a v.42 protocol.
--Ed
> > I don't think that anyone's aware that all modems communicate at 9600 baud,
> > that is the fastest a serial port can go the only difference between a 14,400
> > and a 28,800 is the algorythem for the data compression. If there was a way
> > to emulate that in a new graph link then you could hook up with the internet
> > at 28.8K. Just thought I'd let everyone know.
>
> I don't consider myself an expert on this subject, but if what you're
> saying is true, then obviously the difference between a 14.4k and
> 28.8k modem is entirely hardware-based compression. If it wasn't,
> then software could emulate a 28.8k modem on a 14.4k one, which most
> probably would have been done by now if it was possible.
>
> Thus, to create a faster interface between a calculator and the
> outside world, you would need major hardware modification. If it's
> not possible to make 28.8k out of 14.4k on a 200MHz computer using only
> software, there's no chance it'll be possible using a 10MHz 68000.
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