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Cisco RJ45 to DB25 Cable Pinout -
Adapter DTE M/F Pins1 DCE M/F Pins MMOD Pins2
RJ-45 Pins DB-25 Pins
1 4 5 5
2 20 6 8
3 2 3 3
4 7 7 7
5 7 7 7
6 3 2 2
7 6 20 20
8 5 4 4

25 PIN D-SUB FEMALE RJ45 MALE CONNECTOR