D-Link DE-1824EI User Manual page 40

10BASE-T Stackable Hubs
This means you can cascade to another hub using an ordinary straight-
through twisted-pair cable.
Figure 5 -2 Uplink Switch Setting
When using this method, set the Port 1 Uplink switch to MDI, connect one
end of the straight-through cable Port 1 of the hub, and connect the other end
of the cable to an ordinary (non-uplink) port on the other repeater hub or
Ethernet switch.
Don't try to cascade more than four repeater hub stacks in a line using
twisted-pair cabling. Instead, use a multilevel cascading scheme as discussed
in the Multilevel Cascading section below.
Figure 5 -3 Connection Through Port 1
5-4 Network Connections