Nicholas Leippe wrote:
On Mon Mar 30 2009 10:40:41 Dave Smith wrote:
Nicholas Leippe wrote:
However, in theory I can just tell my computer to speak serial out my
ethernet port.
No, in theory and in practice, you can't. They are totally different
electrical specifications.
Just to clarify, the reason Nicholas is right is because of the Ethernet
MAC and PHY on your computer, which can't speak RS-232.
It was wrong of me to say that it can't be done in theory, because in theory
you could create a chip that could switch modes. Since the practical use is so
small I doubt anyone would ever do so.
Some serial chips, however, can switch between many various modes--rs-232,
rs-422, hdlc, sdlc, T1 (with all the various framings and encodings), etc.
Perhaps this is where you got the idea.
And of course, there are boxes that do use an RJ-45 form factor for
sending out RS-232 signals, like the Cyclades ACS units for example.
--Dave
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