Null modem - Wikipedia
![DIAGRAM] 25 Pin Rs232 Wiring Diagram FULL Version HD Quality ...](http://www.kaboomlatam.com/novosite/null-modem-pinout-db9-80.jpg "DIAGRAM] 25 Pin Rs232 Wiring Diagram FULL Version HD Quality ...")
DIAGRAM] 25 Pin Rs232 Wiring Diagram FULL Version HD Quality ...
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