The GM950 programs through the microphone jack on the front of the radio. You will need: A (RJ-45 to DB9 serial connector).
Do you know if your radio is a GM950 model? Motorola Gm950 Programming Software
or a "RIBless" programming cable is necessary to convert serial signals from a computer to the voltages the radio expects. Timing Issues The GM950 programs through the microphone jack on
The GM950 programming port (RJ45, pinout documented in service manual #6880309J80) uses: Motorola Gm950 Programming Software
If the radio displays an error after writing, load your original backup file and attempt to write it to the radio again to restore functionality. Legalities and Best Practices
Install Drivers:
Third‑party/Dealer Utilities