Link Serial Cable DB 9 «=» DB 25

-------------
\ 5 4 3 2 1 /
 \ 9 8 7 6 /     (Female)
  ---------

-----------------------------------------
\ 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)
  -------------------------------------


DB-9         DB-25

  2 ---------- 2
  3 ---------- 3
  4 ---------- 6
  5 ---------- 7
  6 ---------- 20
  7 ---------- 5
  8 ---------- 4

Note:
Occasionally, we must short pins 1 with 8 of the 
connector DB-9 and 5 with 8 of the connector DB-25.

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