Wireless Data Terminal Unit

Salient features of Wireless Data Terminal Unit :
a. Receive GSM short message without PDU code, output By ASCII code, Chinese character GB code form through standard RS232 interface. Com baud rate: 9600bits/s.
b. Amount of message: 70 Chinese characters each message
c. DB9 Com: 2 PIN output, 3 PIN input, 5 PIN GND.
d. Power supply: voltage: DC 4.5V a 5.5Vi , max current:300mA
e. Shield non-privileged message. Use identify code or verify code to judge if the message is acceptable.

Within 2 seconds after receipt the information from receiving DTU, the control card of the LED display or the computer will give a feedback to GSM DTU, then GSM DTU send the feedback to the sending terminal by SMS. In such way, users can know the receipt situation of each terminal real-time.

Technical Parameter of Wireless Data Terminal Unit :
Processor and memorizer: 8 bits low power consumption processor,
128K SRAM, 256K FLASH
Frequency: 900MHZ, 1800MHZ, 1900MHZ
Power supply Voltage:DC 5V/500mA, working current:250mA,
idle current:a 65mA
Antenna impedance: 50IC/SMA
Receiving sensitive: -104dbm
SIM card: 3V/5V, test automatically
Interface: RS232 (DB9), Baud rate:1200i 57, 600bits/s
Dimension: 92.7x61.3x23mm
Weight: 300g
Working temperature:i 30?Ci 60
Humidity: 0i 95%