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TANDBERG 3G Gateway Data port Command Interface User Guide
2. Connecting to the Data port Command Interface through the RS-232 port.
The RS-232 port is a 9-pin, female, sub-D connector located on the front of the 3G Gateway. The port is
configured as a DCE (Data Communications Equipment). The RS-232 port is default set to 115200 baud, 8
data bits, none parity and 1 stop bit from factory. The RS-232 port is also referred to as the Data port.
2.1. Hardware and Cabling
The pin outs for the RS-232 are defined in the following table (the DTE, Data Terminal Equipment, could be
a PC or other device capable of serial communication).
Pin no Signal Description Direction
1 CD Carrier detect To DTE
2 RD Receive data To DTE
3 TD Transmit data From DTE
4 DTR Data terminal ready From DTE
5 Ground
6 DSR Data set ready To DTE
7 RTS Ready to send From DTE
8 CTS Clear to send To DTE
9 RI Ring indicator To DTE
NOTE! A straight through cable should be used between the TANDBERG 3G Gateway’s RS-232 port and
the DTE.
The figure below illustrates the recommended cable-wiring scheme for connecting the 3G Gateway to a PC
through RS-232.
TANDBERG 3G GATEWAY PC
DCE, 9 pin DTE, 9 pin
1 CD 1 CD
2 RD 2 RD
3 TD 3 TD
4 DTR 4 DTR
5 GND 5 GND
6 DSR 6 DSR
7 RTS 7 RTS
8 CTS 8 CTS
9 RI 9 RI
DTR and RTS are ignored. DSR, CD, and CTS are always asserted, while RI is not used.
2.2. Troubleshooting
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