Operating a modem over the serial interface
Parent topic: Operating a modem over the serial interface

Contact assignment of modem adapter kit

Device signal D-Sub9 plug Device or modem signal D-Sub9 plug
TxD 3 RxD 2
RxD 2 TxD 3
RTS 7 CTS 8
CTS 8 RTS 7
DTR 4 DCD 1
DCD 1 DTR 4
GND 5 GND 5
Parent topic: Operating a modem over the serial interface
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