I know what it was in the cps i checked ( External Accessory Enable) by accident. If theres nothing connected it displayes error 15/10, Mars I looked in cps help doesnt tell me what this feature is do you know?
Enables the external accessory. If it is connected to a radio, this allows the external accessory and the radio to communicate via XCMP (Extended Command and Management Protocol) messages. This feature applies on a radio-wide basis.
For TRBO its supposed to be for things like a keyboard/ display for messaging or mobile data terminals. or to access things like a DEK box or other toys. The dealership I asked wast too clear but they had asked Moto about it sometime in the past.