Longshine LCS-C841MC - Manual (Page 27)

1000Base-T to 1000Base-SX/LX Converter
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Pin 7 White - Brown
Pin 8 Brown
Cat 6 cable (568B type)
Pin 1
White - Orange
Pin 2 Orange
Pin 3 White - Green
Pin 4 Blue
Pin 5 White - Blue
Pin 6 Green
Pin 7 White - Brown
Pin 8 Brown
All Category 5 UTP cables that are used for 100BASE-TX
connections should also work for 1000BASE-T, providing
that all four wire pairs are connected. However, it is
recommended that for all critical connections, or any new
cable installations, Category 6 cable should be used.