3SIM wireless terminal WTN304-1B

3SIM wireless terminalFeatures Support 3 SIM Cards : GSM(A) ,GSM (B) and GSM(C),Conveniently choose GSM(A),GSM(B) ,GSM(C) or PSTN Auto-select Low cost route according setting Simple to install and easy to maintain 4 band GSM module; support GSM850/900/1800/1900MHz With backlight LCD for clear information display Display Caller ID Menu list interface for great operation expediently Last 3000 call logs can be checked Auto detect PSTN telephone line state Can set 64 barred numbers Can set 640 route numbers for 3 GSM Called number auto route out according to preset internal route table Area code can be set; auto add area code before local called number if route from GSM Higher output current level for connection with payphone With billing function and built-in tariff. Real-time display the call duration and costs etc. Download parameter and tariff from PC; Upload call records to PC; Built in rechargeable circuit, support extended accumulator battery (6V/4AH) Technical specifications Power supply AC input voltage 160V 280V AC Power adaptor output DC7.5V/3.0A Battery 6V/4AH Lead-Acid battery(optional) Maximum charging current 600MA DC input voltage range 7.5V 10V DC Working current 1.5A(DC7.5V, Average current, excluding charger current) Application environmentOperating temperature: 0 +45 Celsius Relative humidity: 10% 95% Environment noise ≤60dB(A) Atmospheric pressure 86 106kPa GSM parameters Frequency bands GSM850/900/1800/1900 MHz Frequency stability <2.5ppm Receiver sensitivity < –103dBm Transmit power <2W(900MHz), <1W(1800MHz) SIM card Interface 3V Antenna impedance 50Ω Line interfaceAB line impedance 600Ω AB line loop current 25mA AB line feeding 48V±4V (hang-up status)