Bob,
Does your "plain" serial cable have 25pin on one end and 9pin on the other?
If so, it shoud be 2-3 and 3-2 (because of DB9 toDB25 conversion)
If its 2-2 and 3-3 its a null modem cable (this is what you want)
This is not true if its 9 pin to 9 pin or 25 pin to 25 pin cable
"standard" serial cables are 2-2 and 3-3
Null modems are 2-3 and 3-2
Jeff
Jeff,
I just measured one of my " plain serial" cables, it's 2-2 and 3-3. Now
I'm really confused!!!
"TX" and "RX" have the same pin numbers, so a DCE to DTE needs 2&3
swapped. Does that mean a DCE to DTE needs a null model, or is that the
other way around?????
I always feel like an amateur when playing with RS-232.....
Bob
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