dual card terminal GSN/PSTN WTN303-1B

dual card terminal GSM/PSTNWTN303-1B Features: A, Use high gain external antenna with high signal sensitivity B, LCD display, menu operation interface, easy operation C, Display Caller ID D, Barred number setting E, Auto dial code conversion F, Support 2 SIM Cards : GSM(A) and GSM (B),Conveniently choose GSM(A),GSM(B) or PSTN G, Auto-select Low cost route according setting H, Five working modes: GSM(A+B),PSTN,PSTN/GSM(A+B),GSM(A),GSM(B) Technical specificationsPower supplyAC input voltage 160V 280V AC Power adaptor output DC7.5V/3.0A Battery 6V/4AH Lead-Acid batteryoptional 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 +45C 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), <1W1800MHz 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) Package10pcs/CartonInside boxDimension:32×18.5×5.5(cm)G.W.: 0.7kgExternal cartonDimension:42×36×32(cm) G.W.:8.0kg