Nullmodem Cable Pinout -
| Female | Male | ||
|---|---|---|---|
| Shield Ground | 1 | 1 | Shield Ground |
| Transmit Data | 2 | 3 | Receive Data |
| Receive Data | 3 | 2 | Transmit Data |
| Request to Send | 4 | 5 | Clear to Send |
| Clear to Send | 5 | 4 | Request to Send |
| Data Set Ready | 6 | 20 | Data Terminal Ready |
| Data Terminal Ready | 20 | 6 | Data Set Ready |
| Ground | 7 | 7 | Ground |
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