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PecIfIcatIons
Crossover Cable Wiring
The following table showing the connections for a null modem DB9‑to‑DB9 crossover cable can be used when
making your own cable.
Null Modem Cable Wiring for a DB9‑to‑DB9 Crossover Cable
Pin
Signal Direction
Pin
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
Shield Soldered to DB9 Metal on Both Connectors