Acer ALH-616ds User Manual page 14

2.2.3 Get the stackable cable and connect the cable to the stacking
connectoron the hub, as shown inFigure 2-8. Connect "Down" SCSI port of
the upperhub to "Up" SCSI port of the lower hub. Any loose connection of
the stackablecable will cause problems with network performance and quality.
Figure 2-8 Connect hubs by stacking cable
2.2.4 If you are trying to add more hubs in your office, you can follow the
procedures from 2.2.2 to 2.2.3 repeatedly. Be sure not to stack hubs more
than 5 (include 5) sets in one stack.
2.2.5 Plug the power cord into the outlet on wall and check if the power LED
lights up. The hub is ready for network connection if the power LED lights
up,as shown in Figure 2-9.