DTE
Data
Terminal
Equipment
PC
POS
PLC
Application
Disconnect the mains power before opening the
Serial flow as used in this manual :
TxD
RxD
DTR
DSR
RTS
CTS
RI
DCD
GND
DinBox GSM M4 modem enclosure!
DCE
IN
OUT
Data
Communication
Equipment
Modem
DinBox GSM M4
Communication
device
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