To program a Motorola GM3688 mobile radio, you need the specific Commercial Series Customer Programming Software (CPS)
Software alone isn't enough; you must bridge the connection between your PC and the radio's 8-pin RJ45 mic port. AliExpress Motorola GP3688, GM3188, GP3689 - R05.04 software
Even with genuine software, things go wrong. Here are the top issues and fixes.
Four hours later, as the sun broke over a battered coastline, the first rescue boat pushed off into the debris. The captain keyed the mic. "Command, this is Boat One, do you read?"