If you can open the cable up, a null modem cable will have the pins 2
and 3 swapped over.
But if it is a 25 pin to a 9 pin cable, the pins are functionally
swapped over so for a null modem cable for that it would have 2->2 3->3.
Phil
--
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Philip Trickett email:phil at techworks.ie
CTO, TechWorks Marine Ltd Tel: +353 1 240 1392
Docklands Innovation Park Fax: +353 1 240 1391
128-130 East Wall Road, Dublin 3 http://www.techworks.ie/
Ireland
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