10/100 Dual-Speed Switch User’s Guide
Connecting The Switch
25
NOTE:
The first twisted-pair port (Port 1x) is shared with the
Uplink port. If you connect a device to the Uplink
port, then do not use Port 1x (and vice-versa).
Never have devices connected to the Uplink port
and Port 1x at the same time.
Using a straight cable
The connection shown above uses a normal straight-through cable
to connect the Uplink (MDI-II) port on the DES-1008D switch to
one of the non-Uplink (MDI-X) twisted-pair ports on the other
switch. Alternatively, a straight cable can be used to connect one of
the switch’s normal twisted-pair (MDI-X) ports to another device’s
Uplink (MDI-II) port.
Please note that a straight-through cable is always used when
connecting an MDI-X port to an MDI-II port.
Using a crossover cable
The connection shown above uses a crossover cable to connect Port
2x, a normal twisted-pair (MDI-X) port on the DES-1008D switch,
to one of the non-Uplink (MDI-X) twisted-pair ports on the hub. A
crossover cable must also be used when a connection must be made
between the Uplink port (MDI-II) on the switch and the Uplink
port (MDI-II) on the device being connected. More detailed
information about making and using crossover cables can be found
in Appendix B: Cables and Connectors.
Please note that a crossover cable must be used whenever
connecting an MDI-II port to an MDI-II port or when connecting an
MDI-X port to an MDI-X port.