Connections
INSYS Modem 56k small EU 2.1
14
6.3
Pin Assignment of the Serial Interface
Figure 3: 9-pin sub-D jack at the device
Pin
Signal
Description
1 DCD
Data
Carrier
Detect
2 RXD
Receive
Data
3
TXD Transmit
Data
4
DTR
Data Terminal Ready
5 GND
Ground
6
DSR
Data set ready
7
RTS
Request to send
8
CTS
Clear To Send
9 RI
Ring
Indication
Table 4: Description of the pin allocation of the sub-D jack
