RS 232 Information
25/9 Way Conversion
25 pin
9 pin
Description
1
nc
gnd
2
3
txd
3
2
rxd
4
7
rts
5
8
cts
6
6
dsr
7
5
signal gnd
8
1
dcd
20
4
dtr
22
9
ri
Null modem leads
25 pin
25 pin
1
1
2
3
3
2
4
5&8
5&8
4
6
20
7
7
20
6
9 pin
9 pin
nc
1
2
3
3
2
7
8&1
8&1
7
6
4
5
5
4
6
25 pin
9 pin
nc
2
2
3
3
4
8&1
5&8
7
6
4
7
5
20
6