The box it came in says "Live sound recordings of engineer requesting clearance from dispatcher".
I assumed that would have to be triggered. I've never tinkered with the True-Sounds stuff, it appears it's about 20 years old, maybe died of old age?
I'll take the shell off and post back. This was a secondary issue, the powered unit is overheating it's board, no binding of motors, so I am looking into that first.