GSM модем iRZ TC65 Lite
User Manual
7
1.5. Interfaces
1.5.1. Connector DB9 for Data Cable Connection
The connector is used for connection to the control device, exchange protocol RS232.
Table 2.5.1 Purpose of the connector pins.
Contact
Signal
Direction
Purpose
1
DCD
Modem-PC Availability of carrier wave
2
RXD
Modem-PC Data reception
3
TXD
PC-Modem Data transmission
4
DTR
PC-Modem Availability of data reception
5
GND
general
System housing
6
DSR
Modem-PC Availability of data
7
RTS
PC-Modem Request for transmission
8
CTS
Modem-PC Availability of transmission
9
RI
Modem-PC Call signal
1
2
3
5
4
6
7
8
9
