Data Cable Wiring for the Maxon CP-530 and PicPar Modem
This page simply describes the pinouts and wiring conventions we're using to hook our Maxon Data Radios to the Baycom/Tigertronics PicPar modems.
| Signal | Maxon | Color | DB-9 |
| TXD | 1 | White | 1 |
| RXD | 2 | Green | 5 |
| PTT | 3 | Red | 3 |
| Signal Ground | 6 | Black | 9 |
| Frame Ground | 4 | Shield | None |
Note that on at least one of the Maxon radios we've converted, the black wire from data connector pin 6 does not go to ground. Check for continuity before putting the radio together; it's easy to find another ground point if necessary.