GSM Fixed Wireless Payphone / pay phone project to operator

GSM Fixed Wireless Payphone Model: VG-51   Brief Introduction VinTelecom GSM VG-51 is a worldwide-used payphone, which affords the ultimate in mobility and billing capability, as well as remote tariff & parameters update. It creates business opportunities by enabling the sale of telephone access to the public: the entrepreneurial public phone shop owner is able to instantly set up call shop business anywhere within a mobile network coverage area. Also the operator can manage and maintain all the GSM Payphones remotely and easily by a Wireless 2M terminal.     Main Features and Specifications 1).Support operation mode: pre-payment or post-payment 2).Supporting billing shown in double LCDs 3).Checking call record by daily total,monthly total,yearly total year, and can check record by setting star time and end time 4).Support STK and USSD function (can recharge for mobile phone) ( customized version) 5).Ability to write, send and receive SMS. 6).Voice mail. 7).Lock card, lock terminal, lock net, lock cell 8).Setting the local area code, special service numbers, local number segment 9).Support each-call settle and multi-call settle 10).Fast intelligent dialing numbers 11).Transmit tariff and parameter by local or remote management center 12).Displaying the Service Providers name, signal, electricity power, time and date according to the automatic in-phase network 13).Support remote display(box), control box that allows the phone to operate at a distance, this devicehave an alphanumeric display screen that allows the billing information 14).Support remote management by GSM wireless 2M Terminal (optional). 15).GPRS (optional) 16).Support printer   Technical Specifications GSM double-band 900/1800 MHz or Quad-band 850/900/1800/1900MHz Atmospheric pressure: 86kPa106kPa Relative Humidity: 10%90% Noises: < 60dB Temperature: -10ºC40 Cº Timing accuracy: < 1sec DTMF receiving standard:> = - 23dBm Incoming receiving accuracy: > 99.99% Insertion loss: < =0.5d B   Hardware/Software/Mechanical CPU SIM840 Memory It can save up to 3000 pcs of tariff rate and 1500 pcs of call bills Application:Support STK and USSD (customised version)   Key functions: Support billing for making call Support Remote display(Optional) Suppot Printer(Optional) Support remote management (optional)   GSM Modem SIM840 Display 128*64 pixels Keyboard 25 keys Battery Battery type: Li-ion 1200 mAh Standby time: >7 days Talk time: 4 hours Developing environment OS of SIM340 or SIM840 for design Dimensions 195mm×185mm×85mm Weight 0.85Kg   Power supply AC input voltage AC 100~240 V Power adaptor output DC 12V /1A   Application environment Operating temperature –10℃~55℃ Relative humidity 5%~95% Connectors Antenna (Fixed or TNC type), USBport Frequency range GSM 900/1800MHz or 850/900/1800/1900MHz Receiving sensitivity < –100dBm