INSYS GSM small 2.0
Connections
6.4
Pin Assignment of the Serial Interface
Figure 6: 9-pin D-Sub socket 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 9: Description of the pin allocation of the D-Sub socket
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