6AV6355-1DA00-0DB1 WinCC OA — Driver DNP3 1000 Software Update Service. Allows the application of publicly available patches and upgrades. Duration: 12 months. Must be purchased with a corresponding product. Billing takes place annually in advance. Automatic, chargeable extension by 1 year if not canceled 1 month prior to expiration. No hotline support included. The SUS conditions apply.