Serial Adapter RJ 45 - 10 pin «=» DB 25 pin

         _____
      __|     |__
 ____|           |____
|                     |
| | | | | | | | | | | |     (Female)
| 1 2 3 4 5 6 7 8 9 10|
 ---------------------

-----------------------------------------
\ 13 12 11 10 9  8  7  6  5  4  3  2  1 /
 \ 25 24 23 22 21 20 19 18 17 16 15 14 /     (Female)
  -------------------------------------


RJ-45      DB-25 

  1 -------- 8
  2 -------- 20
  3 -------- 5
  4 -------- 7
  5 -------- 3
  6 -------- 2
  7 -------- 1
  8 -------- 4
  9 -------- 6
 10 -------- 22

Note:
Occasionally, connections 1-8 & 10-22 between
RJ-45 & DB-25, missing if the connector RJ-45
has only 8 pins. 

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