MD-309 User Manual
13
1.6.3
Serial Port Definition
2
Type
RS-232
RS-485
Pin
2
3
5
7
8
Definition
TXD
(out)
RXD
(in)
GND
A
B
Table 1-2: MD-309 serial port pin definition
2
Type
RS-232
RS-485
Pin
2
3
5
7
8
2
3
5
Definition
TXD
(out)
RXD
(in)
GND
RTS
(in)
CTS
(out)
A
B
GND
Table 1-3: MD-309 serial port pin definition
3
2.1
Technical Advantages
eTung DTU products are advanced not only from hardware
industrialization, design rationality, software convenience, and
usage flexibility, but also from working stability. Its technical
advantages are easy to see:
Support point-to-point and multipoint-to-point communication
with 2G wireless network at both ends
Support connecting to 4 data centers at the same time
Support China Mobile and China Unicom’s GPRS, and China
Telecom’s CDMA networks
The serial port DB9 pins support RS232 and RS485 at the same
time, and the serial port type(RS232 or RS485) can be
configured via DTU configuration software or remote control;4
Support sending SMS
Support 2G and SMS as backup
Support modifying DTU configurations via SMS
Support modifying DTU configurations remotely at server side
Support querying SIM card number remotely, checking SIM
card balance and traffic within DTU
Support device remote re-boot
2
This definition applies to MD-309 V3.0.7 and higher versions
3
This definition applies to MD-309 lower versions than V3.0.7
4
MD-309 3.0.7 and higher versions support this function
Summary of Contents for MD-309 2G DTU
Page 8: ...MD 309 User Manual 8 Figure 1 5 9 pin and 9 hole direct serial line Figure 1 6 Power supply ...
Page 9: ...MD 309 User Manual 9 1 4 Dimensions Figure 1 7 MD 309 dimension with shell ...
Page 40: ...MD 309 User Manual 40 Figure Appendix 1 4 Map virtual serial port ...
Page 46: ...MD 309 User Manual 46 Figure Appendix 2 6 Map virtual serial port in vircom ...