12
Installation Guide
Switch Position
Connection
TX+ to TX+
TX- to TX-
RX+ to RX+
RX- to RX-
TX+ to RX+
TX- to RX-
RX+ to TX+
RX- to TX-
When setting the MDI-
II
/MDI-X switch, observe the positioning of the
following symbols:
• the parallel symbol (
II
) indicates a straight-through or parallel
connection (default)
• the cross symbol (
X
) indicates a crossover connection.
These two symbols are clearly marked on the printed circuit board.
Simply slide the switch in the direction of the appropriate symbol.
Set the MDI-II/MDI-X Switch
For each twisted-pair port, a switch is used to implement the transmit
and receive crossover functionality. The switch is positioned just
behind its associated RJ-45 connector. See the illustration below for the
location of the MDI-
II
/MDI-X slide switches.
3
MDI-II Position (default)
DIP Switches
RJ-45
RJ-45
RJ-45
RED
LLCF
LINK
AUTO
TX
MDI-X Position
Slide Switches
6 5 4 3 2 1
SONR
The switch connects the transmit and receive signal pairs in either
straight-through or crossover configurations. The signal routing is as
follows:
