Computer 25 Pin Printer(DTE Device) 25 pin 2 TX-----------------------------3 RX 3 RX-----------------------------2 TX 4 RTS---------------------------5 CTS 5 CTS---------------------------4 RTS 7 Gnd----------------------------7 Gnd 8 CD-----| 20 DTR-|
----------------------------------------------------------------- If using DTR line for Handshaking
2 TX-----------------------------3 RX 3 RX-----------------------------2 TX 4 RTS Not Connected 5 CTS---------------------------20 DTR 7 Gnd----------------------------7 Gnd 8 CD-----| 20 DTR-|
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