Raisecom RC801 User Manual page 17

7 ——TXD 232 signal output
4, 8 ——GND
Others——hang on
The sequence of the cable for connection between LNK-UP port (RJ45) and computer
serial port (DB9 female connector) is as follows.
RJ45
3 ←—
7 —→
4, 8 ——
16
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DB9F
3
2
5