As a digital service provider, you are required to report some incidents to the CSIRT-DSP. You can read more about that here. However, the CSIRT-DSP wants to do more for you as a digital service provider, especially in the case that an incident does not (or not yet) meet mandatory reporting criteria. If your organization suffers an incident, even if it does not meet these criteria, you can contact the CSIRT-DSP 24/7. If a report is not mandatory, this is referred to as a voluntary report.