Gsm modem usb sim

* 8 ports SIM card slots.Just like 8 single-channel equipments work at the same time * 2G GSM Frequency: 900/1800MHz * SMS sending: 600/800/1000/1200 SMS per hour by one port * Connection with the computer through RS232 interface (PCI card is opitonal) can be integrated with USB interface * Each port with separate power switch * Each individual module can be discharged * Bulk sms/mms sending, voice ads, data consumption and IMEI changeable etc * Open AT command * Industrial chassis, elegant shell * Wireless access to interne * Comply with GSM phase2 standard * Internet Services: PPP,TCP, UDP, FTP,HTTP, SMTP, POP3 Model NO. : QS81 Module : QS80 Network : GSM Frequency : Dual band: 850/900/1800/1900 Mhz Max Transmit Power Class 1(1W):DSC1800,PCS1900 Class 2(2W):GSM850,EGSM900 SIM Port : 8 x SIM card(big/small) slots SMS quantity : Send 600/800/1000/1200 SMS per hour by one port SIM port : Big card:85*53mm , small card:25*15mm, 1.8V or 3V Port : USB2.0/PCI Function:Bulk sms/mms,voice,wap,imei change,stk recharge,CSD,etc. Internet : Wireless Access to internet With TCP/IP stack Internet Services: PPP,TCP, UDP, FTP,HTTP, SMTP, POP3 AT command PC System : Windows2000,Windows XP,Windows Vista,Windows 7,WinCE 4.2,WinCE 5.0,WinCE 6.0,Linux,MAC Input voltage DC 12V~24V Working temperature -20℃~+70℃ Storage temperature -40℃~+85℃ Size : 220*120*114mm Package size : 27*21*17.1cm Housing : Aluminum Casing Weight :3.0kg Accessories :AC/DC adapter, USB cable/PCI card, Antennas and driver

Professional GSM GPRS modem manufacturer. * We can offer secondary development controls, SDK DLL, customized AT commands for own modules. * We integrate multi chipsets inside Serial port data cable, instead of traditional PCI interface card, more stable and convenient, anti signal interference, electromagnetic shielding. * Bulk SMS, multi recharge and voice broadcasting three in one module available. * Own developed module, own developed software, own manufacture help us offer competitive price, professional service, fast response and stable performance to clients. Web: http://en.gzqida.com Email: puiyee[at]gzqida.com

GSM Modem with quad band. RS232/USB interface.For bulk sms, voice call, imei change. Provide AT command, Secondary Development for industry.