CXErrorCodeIncomingCallError.Code.unknown An unknown error occurred. Declarationcase unknown See AlsoErrorsCXErrorCodeIncomingCallError.Code.unentitledCXErrorCodeIncomingCallError.Code.callUUIDAlreadyExistsCXErrorCodeIncomingCallError.Code.filteredByDoNotDisturbCXErrorCodeIncomingCallError.Code.filteredByBlockList