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GSM USB Modem

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GSM USB ModemGSM USB Modem
This is a plug and play GSM Modem with USB interface. It works on frequencies 900/ 1800 MHz Use it to send SMS, make and receive calls, and do other GSM operations by simple AT commands through USB interface from computers. It uses the popular SIM900A module for all its GSM operations. Through USB, the modem can be operated from a computer to send/receive calls, messages, etc.

The modem consists of all the external circuit required to start experimenting with the SIM900A module like the power regulation, external antenna, SIM Holder, etc.

Features:
  • Uses the extremely popular SIM900A GSM module
  • USB communication allows direct communication with computers
  • Power, Status and Network LEDs for easy debugging
  • Can be used for GSM based Voice communications, Data/Fax, SMS,GPRS and TCP/IP stack
  • Can be controlled through standard AT commands
  • Comes with option for adding an external antenna through an SMA connector
  • The SIM900A allows an adjustable serial baud rate from 1200 to 115200 bps
  • Modem has low power consumption of 0.25 A during normal operations and around 1 A during transmission
  • Operating Voltage: 7 – 15V AC or DC (board has onboard rectifier)

AT Command Manual
USB Driver

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