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9 pin D-SUB male connector layout
9 pin D-SUB male connector
Pin Name Description
1 n/c Not connected
2 DSR Data Set Ready
3 GND Ground
4 n/c Not connected
5 RxD Receive Data
6 DTR Data Terminal Ready
7 DCD Output from modem
8 GND Ground
9 TxD Transmit Data
9 pin D-SUB female connector layout
9 pin D-SUB female connector
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Source(s) of this and additional information: Technote HW19: Pinouts at Apple Technical Notes, from Hardware Book
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