Feature:1. Easy Connection: This fixed wireless terminal operates on a GSM network. The terminal is connected to an ordinary wired desktop phone and a standard SIM card to make local, national and international calls.2. Wide Application: This GSM desktop caller is suitable for remote area, mountains, telemarketing, public shop, office, factory, removable places such as ships, trains, and long distance buses.3. Easy Installation: This GSM ID dialer uses GSM mobile phone SIM card, which is easy to install and operate under stable performance.4. Antipodal Signal: This GSM fixed wireless terminal has antipodal signal which can be connected to fare register or computer fare register.5. Powerful Signal Reception: This GSM caller features powerful signal reception and easy setting, and it can be operated at the same way as ordinary landline telephone.Specification:Item Type: Fixed Wireless TerminalMaterial: ABSInstallation: Use Gsm Mobile Phone Sim Card Without Ground Wireline Investment. Easy InstallationVoice Services: Support International and Domestic, Local, Fixed/Mobile Voice ServicesOperation: Do Not Change the Original Dialing Habits, and the Operation Habits of Ordinary Telephone Landlines Are the SameAntipodal Signal: With Antipodal Signal, Can Be Connected to the Fare Register or Use a Computer Fare Register.Watchdog: Inbuilt Watchdog Circuit on Duty. Automatically Detects the Running Status of the Device, and Restarts Automatically when a Fault OccursNo Error: DTMF Transmission Mode, the Caller ID Error is 0IP Function: Automatic IP Function, Multiple Groups of IP SettingsCalling Party: Calling Party IP Prefix of Fixed Long Distance Calling, Such As 17951, 17911, and 193, etc.Permission Setting: Permission Setting of Incoming Call of International, National, and Local CallsCode Preset: Preset Local Area Code, Local Number Segment, and Forbidden Number or Number SegmentEncryption Settings: Such As PIN, PUK Encryption Machine Card Locking FunctionLED Lights: Display Signal, Standby State, Working State and Other InformationCaller ID: SupportedInterface Type: RJ11Network Supported: GSM: 850/900/1800/1900MHzVisual Function: NoneApplication Scope: Wireless Access, SecurityNumber Storage Function: SupportedRecording Function: NoneNetwork Parameters GSM: GSM:1900/1800/900/850MSignal Sensitivity: <-104DBMTransmit Power: <2WAntenna Power: >1.5dbPower Supply: 5V 1AEquipment Power: <5WRJ11 Dial Tone Frequency: 450HZRJ11 Feed Current: 20MA to 40mARJ11 Reversed Polarity: SupportedRJ11 Call: DTMFWorking Environment Temperature: Minus 20 to 50Operating Environment Relative Humidity: 10 to 90%Product Size: Approx. 12 x 8.5cm / 4.7 x 3.3in ( Manual Measurement, Slight Error May Exist ).Package List:1 xFixed Wireless Terminal1 x Power Plug1 x Antenna1 x Antenna Receiver1 x Phone Line1 x User Manual