
20
OP/TD
15 pin
passive
DAA 25 pin
TTY
IPP passive
DAA active
9 pin
25 pin
S o c k e t
P i n s
Pins
S o c k e t
RXD+
2
9
CST+
5V 20mA
3
100
4
GND
1
10
CST-
Sig. GND
5
IPP passive
TD/OP active
9 pin
15 pin
S o c k e t
P i n s
Pins
S o c k e t
RXD+
2
7
TXD-
5V 20mA
3
100 11
+24V 20mA
4
6
TXD+
GND
1
15
GND
Sig. GND
5