タイトルまたは説明

a. Receive GSM short message without PDU code, output By ASCII code, Chinese character GB code form through standard RS**2 interface. Com baud rate: ***0bits/s. b. Amount of message: *0 Chinese characters each message c. DB9 Com: 2 PIN output, 3 PIN , 5 PIN GND. d. Power supply: voltage: DC 4.5V — 5.5V，, max current:**0mA e. Shield non-privileged message. Use identify code or verify code to judge if the message is acceptable. f. Feedback 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 Processor and memorizer: 8 bits low power consumption proccesor, **8K*8 SRAM, **6K*8 FLASH Frenquency: **0MHZ, ***0MHZ, ***0MHZ Power supply Voltage:DC 5V/**0mA, working current:**0mA, idle current:《*5mA Antenna impedence: *0Ω/SMA Receiving sensitive: ***4dbm SIM card: 3V/5V, test automatically Interface: RS**2 (DB9), Baud rate:***0～*7, **0bits/s Dimension: *2.7x*1.3x*3mm Weight: **0g Working temperature:－*0～*0 centigrade humidity: 0－*5%