A common mistake is trying to use meant for the Commercial Series (like the CDM or PM400). That won't work.
To the casual observer, the CM340 was just a rugged, no-nonsense mobile radio—a workhorse for taxi fleets and construction crews. But to Elias, it was a locked puzzle. The local logistics firm had bought a dozen of them second-hand, and they were currently stuck on a frequency used by a long-defunct plumbing company. He launched the Commercial Series Customer Programming Software (CPS) motorola cm340 programming software