QSC-100D Pinout: DB-37 Female to 4 DB-9 male or 4 DB-25 Male Connectors
SIGNAL |
PORT 1 |
PORT 2 |
PORT 3 |
PORT 4 |
| DCD | PIN 2 | PIN 25 | PIN 11 | PIN 34 |
| GROUND | PIN 3 | PIN 26 | PIN 12 | PIN 35 |
| CTS | PIN 4 | PIN 27 | PIN 13 | PIN 36 |
| RxD | PIN 5 | PIN 28 | PIN 14 | PIN 37 |
| RI | PIN 20 | PIN 6 | PIN 29 | PIN 15 |
| DTR | PIN 21 | PIN 7 | PIN 30 | PIN 16 |
| DSR | PIN 22 | PIN 8 | PIN 31 | PIN 17 |
| RTS | PIN 23 | PIN 9 | PIN 32 | PIN 18 |
| TxD | PIN 24 | PIN 10 | PIN 33 | PIN 19 |
