Re: A question requiring a creative solution
- From: Jim Stewart <jstewart@xxxxxxxxxxx>
- Date: Thu, 30 Nov 2006 11:57:50 -0800
bar.eitan@xxxxxxxxx wrote:
Hello there :) I have been given a question which involves some
thinking and understanding of the RS-232 standard but with an imaginary
interface. I can use any equipment i want except a cable that connects
my pc to a modem.
The standard is called ABC, and it has the following pins:
SG,RTS,DSR,DTR,RX,TX
i have to find which of each of the six pins making up the ABC
interface actually correlates to the aforementioned pin functions. It
is also mentioned that the terminal will not raise RTS before it
receives DSR. Does anyone have any idea how i can find out which pin
does, regardless of costs and equipment (except the DTE-DCE cable).
Thanks alot, i know it's an odd question but it would definetly help me
see a creative answer to questions i wouldn't know how to tackle
I'm not going to do your homework, but I'll
give you a couple of clues. BTW, this is
a great practical problem and one that you're
liable to run into on some sad late night.
Clue #1:
You can immediately sort the inputs and outputs
with nothing more than a voltmeter. How would
you do it?
Clue #2:
What are the voltage levels for true and
false RS-232 and what would you expect them
to be for the corresponding output signals?
.
- References:
- A question requiring a creative solution
- From: bar . eitan
- A question requiring a creative solution
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