User Manual
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10/100Base T(x) RJ45 Pinouts 
MDI Port Pinouts 
MDI-X Port Pinouts 
8-pin RJ45 
Pin 
Signal 
1 
Tx+ 
2 
Tx- 
3 
Rx+ 
6 
Rx- 
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; contrary 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. If you make your own cable, we suggest 
labeling the two sides of the same line with the same letter (A-to-A and 
B-to-B, as shown below, or A1-to-A2 and B1-to-B2). 
SC-Port Pinouts 
SC-Port to SC-Port Cable Wiring 










