D-Link DES-1008D - Manual (Page 17)

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MDI-X Jacks: Use these jacks to connect stations to the hub. These
are MDI-X (Medium-Dependent Interface, Cross-wired) jacks,
which mean, you can use ordinary straight-through twisted-pair
cables to connect user machines and servers to the hub through
them. If you need to connect another device with an MDI-X jack,
such as another hub or an Ethernet switch, you should use a
crossover cable, or make the connection using the MDI-X jack
(described below).
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Uplink Jack(s) (MDI-II): Use this jack to connect stations to the
hub. This is an MDI-II (Medium-dependent Interface, straight-
wired) jack, which means you can connect the hub to a device with
an MDI-X port using an ordinary straight-through cable, making a
crossover cable unnecessary.