4140 to IBM Compatible Computer Cable:
9 pin FEMALE 9 pin FEMALE
Rx (pin 2) ..................... Tx (pin 3)
Tx (pin 3) ..................... Rx (pin 2)
DTR (pin 4) .................. DSR (pin 6)
DSR (pin 6) .................. DTR (pin 4)
RTS (pin 7) .................. CTS (pin 8)
CTS (pin 8) .................. RTS (pin 7)
GND (pin 5) ................. GND (pin 5)