The Archive Server has a local MS SQL Server Database.
The Review Workstation has a local MS Access database
The RT workstation also has an MS Access database.
You can either send your acquired data to a Review workstation or directly to the Archive. If images are first sent to a Review workstation, you would forward to the Archive from there, else the Review workstation would import an image from the Archive. At the time the data is being analyzed by Review it is local in the MS Access database.