Technology parameters
1) Antenna interface standard: CDMA   -( Z
2 UIM card: Support 3V/ 1.8 V ( adaptive) ' - UIM card
3 Phone interface: DTMF line interface ( RJ-11 phone interface)
On-hook voltage: 45V
Off-hook current: 30 mA/ 41mA
Dialing tone frequency: 450 Hz
4 Antenna interface: antenna gain > 3.5 DB
Sensitivity < -104 DBM
Antenna transmission power: < 3 W
Impedance: 50 ohm
5 Series interface: RS-232 ( Use the appointed data cable)
6 Working environment:
Operation temperature: -20  ~ 60 
Operation humidity: 45% ~ 95%
Store temperature: -20  ~ 60 
Atmosphere pressure 86 ~ 106 Kpa
Environment noise < 60dB