RS-232 pinout

DSUB9 female DSUB9 male

DB-9 DB-25 Name 8P8C Dir Color
1 DCD 8 (бел) in black
2 RXD 6 (желт) in brown
3 TXD 3 (черн) out red
4 DTR 2 (ор) out orange
5 GND 5 (зел) pow yellow
6 DSR 1 (син) in green
7 RTS 4 (крас) out blue
8 CTS 7 (кор) in purple
9 RI in white

Cisco cable

Name 8P8C Color DB-9f
CTS 1 Black 8
DSR 2 Brown 6
RXD 3 Red 2
GND 4 Orange 5
GND 5 Yellow 5
TXD 6 Green 3
DTR 7 Blue 4
RTS 8 Gray 7
 
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