CDMA: CDMA2000 1X Frequency range: 869MHz ~ 894MHz Sensitivity: -105dBm Transmitter frequency: 824MHz ~ 849MHz Frequency stability: ?300Hz Output power: max 0.2W; min 10nW (-50dBm) GSM Frequency range: GSM900: uplink 880~915MHz Downlink 925~960MHz GSM1800: uplink 1710~1785MHz Downlink 1805~1880MHz Transmitter power: GSM900: 31~35dBm GSM1800: 28~32dBm Receiver sensitivity: no less than -102dBm Two standard RJ11 ports, FXS for analog phones, other for the console ( FXS for analog phones, FXO for PSTN) G3 Fax function optional Standard SMA antenna interface RS232 port connect PC for wireless Internet Access Switch call/Internet Mode Supports DTMF phone Caller ID Accurate charging by signal or bidirectional voice detection Provides reverse charge signal to connect meter Supports lock terminal and Card Supports protection of PIN Code Indicating light: Power, Run, Charge, calling, Wireless network Different power optional: 72 hours standby, 24 hours calling/ 8 hours standby,4 hours calling Button configures parameters Supports force reset factory setting