DSC 03 December 2025 17:44 Updated DSCDSC functions are not working Possible cause Solution MMSI number not programmed. You must programme your MMSI number. Each VHF radio requires a unique MMSI number. In the United States, this MUST be programmed into the unit by an authorized dealer. See here for information on how to obtain your MMSI number. Related articles Wireless network Alarms Power Mounting the X100 Audio