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RJ45 (8-pin, MDI) Port Pinouts
Pin
Signal
1
Tx+
2
Tx-
3
Rx+
6
Rx-
RJ45 (8-pin, MDI-X) Port Pinouts
Pin
Signal
1
Rx+
2
Rx-
3
Tx+
6
Tx-
RJ45 (8-pin) to RJ45 (8-pin) Straight-through Cable Wiring
RJ45 (8-pin) to RJ45 (8-pin) Cross-over Cable Wiring
100BaseFx Ethernet Port Connection
The concept behind the SC/ST port and cable is quite straightforward.
Suppose you are connecting devices I and II. As opposed to electrical signals,
optical signals do not require a circuit in order to transmit data. Consequently,
one of the optical lines is used to transmit data from device I to device II, and
the other optical line is used transmit data from device II to device I, for
full-duplex transmission.
Remember to connect the
Tx (transmit)
port of device I to the
Rx (receive)
port of device II, and the
Rx (receive)
port of device I to the
Tx (transmit)
port of device II.
