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User:Deelkar/Sandbox

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Null modem cable pin mapping

[edit]

This is the most common pin mapping, one common variant is to also connect pins 1 and 6

9 pin to 9 pin
CD 1 4
RD 2 3
TD 3 2
DTR 4 1
DTR 4 6
SG 5 5
DSR 6 4
RTS 7 8
CTS 8 7
 
9 pin to 25 pin
1 20
2 2
3 3
4 6
4 8
5 7
6 20
7 5
8 4
9 pin to 9 pin9 pin to 9 pin
CD1118
RD2322
TD3233
DTR4646
Ground5557
DSR64620
RTS7875
CTS8784
-99922