| Signal | Direction | Din-8 Connector | Hayes DCE Connector | Signal | Direction |
| HSKo | Out | 1 | 6 | DSR | In |
| (DTR) | | | 20 | DTR | In |
| HSKi | In | 2 | 8 | DCD | Out |
| (CTS) | | | 5 | CTS | Out |
| TxD- | Out | 3 | 2 | TxD | Out |
| Gnd | | 4 | 1 | Gnd |
| | 8 | 7 |
| RxD- | In | 5 | 3 | RxD | In |
| | 6 | No connect |
| | 7 | No connect | |
Connect pins:
1. Macintosh side of cable: 4 and 8
2. Hayes side of cable:
a. 6 and 20
b. 8 and 5
c. 1 and 7
The pins on the male end of the circular Mini DIN-8 connector are numbered as shown:
6 7 8
3 4 5
1 2
You could also use the Apple II Printer - Mini DIN-8 Cable (part number 590-0556 or 590-0335), although the pinouts are slightly different.
Below are the pinouts for connecting the Hayes V series 9600 baud modems to the Macintosh with a DIN-8 serial port, direct from Hayes:
Hayes 9600 V Macintosh
1-7 4-8
2 3
3 5
5 2
4 1