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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-|
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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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