Below is the result of collecting the operation status for TCRP users.   DS3617xs (Operation OK) DS3615xs (Operation OK) DS3622xs+ (Operation OK) DVA3221 (Operation OK) DVA1622 (Operation OK) DS918+ (Operation Not OK) DS920+ (Operation Not OK) DS1621+ (Operation Not OK) DS2422+ (Operation Not OK) DS1520+ (Operation Not OK)   GeminiLake (DS920+, DS1520+, etc.), known as a DTC-only model and V1000 (DS1621+, DS2422+, etc.), this function does not work, and DS