: If you use a serial (DB9) cable, you will likely need a USB-to-serial adapter with a reliable chipset like FTDI or Prolific to ensure the computer recognizes the COM port correctly. 2. Software Configuration for Modern PCs
Since I am totally into these Motorola devices at the moment I picked up a GM350 and looked into the programming of these devices. Programming the Motorola GM950 on Windows 10 motorola gm950 programming software work
Comprehensive Guide: Making Motorola GM950 Programming Software Work : If you use a serial (DB9) cable,