Dear fellow SAP on IBM I enthusiasts,
A common way to run ADS is as a standalone service. An ADS hub provides Print Services and Interactive Forms to all SAP NW systems in your landscape.
ADS as a standalone hub
Because ADS components require a Windows, Linux or Unix installation, SAP entitles you to free-of-charge MaxDB licenses for running ADS as a standalone hub. All SAP NW Java installations provide a wizard for configuring ADS for use by other SAP systems:
SAP NW Java - ADS Wizard
For detailed information see SAP Note 2039539