How to make a serial cable (RS232/PS2 serial interface).

You need the information below to make your own cable

PrintServer's male connectors	HP and Lexmark printers with 25 pin connector (DB25)	HP printers with 9 pin connector (DB9)
Pin 1 _DTR (out)	Pin 6 CTS	Pin 4 DSR
Pin 2 _RxD (in)	Pin 2 TxD	Pin 2 TxD
Pin 3 GND	Pin 7 GND	Pin 5 GND
Pin 4 5 Volt
Pin 5 DSR (in)	Pin 20 DTR	Pin 6 DTR
Pin 6 TxD (out)	Pin 3 RxD	Pin 3 RxD

Front view of male connector

The table above shows the signal levels on pin 1 - 6 of the PrintServer's male connector. Consult your printer's documentation for information about the signal levels of its serial connector.