ISPSoft User Manual Method 1 Choose a redundant expansion backplane model from the Product List and drag to System Configuration area; when the redundant expansion backplane is dropped onto the blank workspace area, the new backplane is placed underneath the present one. When the redundant expansion backplane is dragged to an existed redundant expansion backplane, the new redundant expansion backplane is placed on top of the existed one. * A redundant expansion backplane cannot be dropped on top of the main backplane and redundant backplane nor exist along with expansion backplanes. 3-142